feat: 新增波形能量动画系统 plot_wave.py
- 创建 plot_wave.py: 从 display.txt 读取原子位移数据 绘制纵波(x) + 横波(y) + 横波(z) 波形随时间的动画 同时绘制系统动能/弹性势能/总能量/输入功率(dE/dt)时变曲线 输出 wave_animation.gif - 所有 input.txt 新增 step_plot_wave: 0 开关 - case05 开启 step_plot_wave: 1 - dynamics.py disp_data 新增 bond_stiffness/bond_rest_lengths - 更新案例文档
This commit is contained in:
@@ -317,10 +317,11 @@ def update_camera_info(event=None):
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c = view.camera
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camera_info.text = (
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"Camera\n"
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f"center = ({c.center[0]:.2f}, {c.center[1]:.2f}, {c.center[2]:.2f})\n"
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f"distance = {c.distance:.2f}\n"
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f"elevation = {c.elevation:.2f}\n"
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f"azimuth = {c.azimuth:.2f}"
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f"center = ({c.center[0]:.1f}, {c.center[1]:.1f}, {c.center[2]:.1f})\n"
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f"distance = {c.distance:.1f}\n"
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f"elevation = {c.elevation:.1f}\n"
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f"azimuth = {c.azimuth:.1f}\n"
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f"step = {PAN_SPEED:.1f} | {'透视' if _PERSPECTIVE else '正交'}"
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)
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@@ -333,6 +334,7 @@ def update_ball_info(frame_idx, x, y, z, vx, vy, vz):
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f"t = {t:.2f} s | dt = {DT:.3f} s | nstep = {NSTEP}\n"
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f"Position: ({x:.2f}, {y:.2f}, {z:.2f})\n"
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f"Velocity: ({vx:.2f}, {vy:.2f}, {vz:.2f})\n"
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f"W/S 沿Z轴 | A/D 左右 | Q/E 升降 | C/X 步长 | V 透视/正交"
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)
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@@ -358,28 +360,99 @@ def reposition_camera_info(event=None):
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update_camera_info()
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# ── 平移速度 & 投影模式(全局变量)──
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PAN_SPEED = 1.0
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_PERSPECTIVE = True # True=透视, False=正交
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def handle_view_interaction(event):
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update_camera_info()
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def rotate_about_screen_normal(angle):
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if hasattr(view.camera, "roll"):
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view.camera.roll = (view.camera.roll + angle) % 360
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else:
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view.camera.azimuth = (view.camera.azimuth + angle) % 360
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update_camera_info()
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def handle_key_press(event):
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global PAN_SPEED, _PERSPECTIVE
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key_name = ""
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if getattr(event, "text", None):
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key_name = event.text.lower()
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elif getattr(event, "key", None) is not None:
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key_name = str(event.key).lower()
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if key_name == "q":
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rotate_about_screen_normal(-90)
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elif key_name == "e":
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rotate_about_screen_normal(90)
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c = view.camera
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# ── 投影切换 ──
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if key_name == "v":
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_PERSPECTIVE = not _PERSPECTIVE
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try:
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if _PERSPECTIVE:
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c.fov = 60.0
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else:
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c.fov = 0.0
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print(f"[draw] 投影模式: {'透视' if _PERSPECTIVE else '正交'}")
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except Exception:
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print("[draw] 当前相机不支持 fov 切换")
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update_camera_info()
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return
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# ── 步长控制 ──
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if key_name == "c":
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PAN_SPEED = min(PAN_SPEED * 1.5, 50.0)
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print(f"[draw] 步长: {PAN_SPEED:.1f}")
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update_camera_info()
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return
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elif key_name == "x":
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PAN_SPEED = max(PAN_SPEED / 1.5, 0.05)
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print(f"[draw] 步长: {PAN_SPEED:.1f}")
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update_camera_info()
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return
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# ── 计算相机方向向量 ──
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import math as _math
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azim_rad = _math.radians(c.azimuth)
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elev_rad = _math.radians(c.elevation)
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# 视线方向(从 center 指向相机)
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vd = np.array([
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_math.cos(elev_rad) * _math.sin(azim_rad),
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_math.sin(elev_rad),
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_math.cos(elev_rad) * _math.cos(azim_rad),
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])
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vd /= np.linalg.norm(vd)
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# 屏幕右方向
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world_up = np.array([0.0, 1.0, 0.0])
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right = np.cross(vd, world_up)
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rn = np.linalg.norm(right)
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if rn > 1e-10:
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right /= rn
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else:
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right = np.array([1.0, 0.0, 0.0])
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# 屏幕上方向
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up = np.cross(right, vd)
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un = np.linalg.norm(up)
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if un > 1e-10:
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up /= un
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else:
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up = np.array([0.0, 1.0, 0.0])
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pan = PAN_SPEED * 0.3
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if key_name == "a": # 右移(屏幕右方向)
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c.center = tuple(np.array(c.center) + right * pan)
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elif key_name == "d": # 左移(屏幕右方向负向)
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c.center = tuple(np.array(c.center) - right * pan)
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elif key_name == "e": # 上升(屏幕上方向,原 W 的功能)
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c.center = tuple(np.array(c.center) + up * pan)
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elif key_name == "q": # 下降(屏幕上方向负向,原 S 的功能)
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c.center = tuple(np.array(c.center) - up * pan)
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elif key_name == "w": # 相机沿 Z 轴上移(靠近场景)
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c.center = (c.center[0], c.center[1], c.center[2] + pan)
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elif key_name == "s": # 相机沿 Z 轴下移(远离场景)
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c.center = (c.center[0], c.center[1], c.center[2] - pan)
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else:
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return
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update_camera_info()
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def reset_camera_view():
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+12
-1
@@ -125,7 +125,7 @@ def run_case(config_path, runtime_base, input_dir="input", output_dir="output",
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print(f"[run] 同时指定了 T_total 和 NT,使用 NT={config['NT']}")
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# 显示步骤控制信息
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steps_info = {k: config.get(k, 1) for k in ["step_simulate", "step_sample", "step_plot", "step_animation"]}
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steps_info = {k: config.get(k, 1) for k in ["step_simulate", "step_sample", "step_plot", "step_plot_wave", "step_animation"]}
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step_flags = ", ".join(f"{k}={v}" for k, v in steps_info.items())
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print(f"[run] 步骤开关: {step_flags}")
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@@ -295,6 +295,8 @@ def run_case(config_path, runtime_base, input_dir="input", output_dir="output",
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"atom_velocities": data["atom_velocities"] if "atom_velocities" in data else np.array([[float(data["VX0"]), float(data["VY0"]), float(data["VZ0"])]]),
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"atom_fixed": data["atom_fixed"] if "atom_fixed" in data else np.array([[0, 0, 0]]),
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"bond_pairs": data.get("bond_pairs", np.zeros((0, 2), dtype=np.int64)).tolist(),
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"bond_stiffness": data.get("bond_stiffness", np.zeros(0, dtype=np.float64)).tolist(),
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"bond_rest_lengths": data.get("bond_rest_lengths", np.zeros(0, dtype=np.float64)).tolist(),
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"warmup_steps": warmup_steps,
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"sample_start": sample_start,
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"sample_end": sample_end,
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@@ -500,6 +502,15 @@ def run_case(config_path, runtime_base, input_dir="input", output_dir="output",
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else:
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print("[run] 运行 python draw.py 查看动画。")
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# 6. 波形能量动画(可选)
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if config.get("step_plot_wave", 0):
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try:
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import plot_wave as pw
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print("[run] 正在绘制波形与能量图…")
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pw.plot_wave(str(output_dir_abs))
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except Exception as e:
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print(f"[run] 绘制波形图失败: {e}")
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def main():
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parser = argparse.ArgumentParser(description="物理模拟统一入口")
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@@ -8,6 +8,7 @@
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step_simulate: 1 # 运行物理模拟 → output/trajectory.txt
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step_sample: 1 # 抽帧 → output/display.txt
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step_plot: 1 # 绘制轨迹/能量图 → output/trajectory_plots.png
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step_plot_wave: 0 # 绘制波形能量动画 → output/wave_animation.gif
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step_animation: 1 # 自动播放 VisPy 3D 动画窗口(需安装 vispy)
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force_calc: 0 # 强制重新计算:1=跳过缓存强算,0=自动使用已有输出
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@@ -8,6 +8,7 @@
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step_simulate: 1 # 运行物理模拟 → output/trajectory.txt
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step_sample: 1 # 抽帧 → output/display.txt
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step_plot: 1 # 绘制轨迹/能量图 → output/trajectory_plots.png
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step_plot_wave: 0 # 绘制波形能量动画 → output/wave_animation.gif
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step_animation: 1 # 自动播放 VisPy 3D 动画窗口(需安装 vispy)
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force_calc: 0 # 强制重新计算:1=跳过缓存强算,0=自动使用已有输出
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@@ -8,6 +8,7 @@
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step_simulate: 1 # 运行物理模拟 → output/trajectory.txt
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step_sample: 1 # 抽帧 → output/display.txt
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step_plot: 0 # 绘制轨迹/能量图 → output/trajectory_plots.png
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step_plot_wave: 0 # 绘制波形能量动画 → output/wave_animation.gif
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step_animation: 1 # 自动播放 VisPy 3D 动画窗口(需安装 vispy)
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force_calc: 0 # 强制重新计算:1=跳过缓存强算,0=自动使用已有输出
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@@ -8,6 +8,7 @@
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step_simulate: 1 # 运行物理模拟 → output/trajectory.txt
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step_sample: 1 # 抽帧 → output/display.txt
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step_plot: 0 # 绘制轨迹/能量图 → output/trajectory_plots.png
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step_plot_wave: 0 # 绘制波形能量动画 → output/wave_animation.gif
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step_animation: 1 # 自动播放 VisPy 3D 动画窗口(需安装 vispy)
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force_calc: 0 # 强制重新计算:1=跳过缓存强算,0=自动使用已有输出
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@@ -356,10 +356,14 @@ step_animation: 1 # 播放动画</pre>
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<tr><th>操作</th><th>效果</th></tr>
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<tr><td>鼠标拖动</td><td>旋转视角</td></tr>
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<tr><td>滚轮</td><td>缩放</td></tr>
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<tr><td>W / S 键</td><td>相机沿 Z 轴向前 / 向后移动(靠近/远离场景)</td></tr>
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<tr><td>A / D 键</td><td>视角向右 / 向左平移</td></tr>
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<tr><td>E / Q 键</td><td>视角上升 / 下降(屏幕方向)</td></tr>
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<tr><td>C / X 键</td><td>增大 / 减小步长</td></tr>
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<tr><td>V 键</td><td>切换透视 / 正交投影</td></tr>
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<tr><td>左上角 <strong>reset</strong> 按钮</td><td>复位视角到初始位置</td></tr>
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<tr><td>左上角 <strong>info</strong> 按钮</td><td>切换信息面板显示/隐藏</td></tr>
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<tr><td>左上角 <strong>axes</strong> 按钮</td><td>切换坐标轴显示/隐藏</td></tr>
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<tr><td>Q / E 键</td><td>画面绕视向旋转 -90° / +90°</td></tr>
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</table>
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</div>
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</section>
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@@ -395,6 +399,7 @@ step_animation: 1 # 播放动画</pre>
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<tr><td>step_simulate</td><td>跳过模拟(加载已有轨迹)</td><td>运行物理模拟</td></tr>
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<tr><td>step_sample</td><td>跳过抽帧</td><td>从轨迹抽取显示帧</td></tr>
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<tr><td>step_plot</td><td>不生成图表</td><td>生成轨迹/能量图</td></tr>
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<tr><td><strong>step_plot_wave</strong></td><td>不生成波形图</td><td>生成波形能量动画 GIF</td></tr>
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<tr><td>step_animation</td><td>不启动动画</td><td>自动打开 VisPy 3D 窗口</td></tr>
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<tr><td>force_calc</td><td>自动检测缓存</td><td>强制重新计算</td></tr>
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</table>
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@@ -418,7 +423,8 @@ step_animation: 1 # 播放动画</pre>
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│ ├── trajectory.txt # 全量轨迹数据(10000 步 × 60 原子)
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│ ├── display.txt # 抽帧后的动画数据(200 帧 × 60 原子)
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│ ├── dynamics.log # 计算日志
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│ └── animation.log # 动画启动日志(闪退时排查用)
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│ ├── animation.log # 动画启动日志(闪退时排查用)
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│ └── wave_animation.gif # 波形能量动画(step_plot_wave=1 时生成)
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├── doc/
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│ └── index.html # <span class="cm">本文档</span>
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├── Readme.md # 案例简介
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@@ -1,2 +1,2 @@
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bond_name k rest_length
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k1 50.0 1.0
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k1 100.0 1.0
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@@ -1,61 +1,61 @@
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n mass radius x y z vx vy vz fix_x fix_y fix_z
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1 1 0.1 0 0 1 0 0 0 1 1 0
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2 1 0.1 1 0 0 0 0 0 1 1 0
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3 1 0.1 2 0 0 0 0 0 1 1 0
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4 1 0.1 3 0 0 0 0 0 1 1 0
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5 1 0.1 4 0 0 0 0 0 1 1 0
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6 1 0.1 5 0 0 0 0 0 1 1 0
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7 1 0.1 6 0 0 0 0 0 1 1 0
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8 1 0.1 7 0 0 0 0 0 1 1 0
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9 1 0.1 8 0 0 0 0 0 1 1 0
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10 1 0.1 9 0 0 0 0 0 1 1 0
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11 1 0.1 10 0 0 0 0 0 1 1 0
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12 1 0.1 11 0 0 0 0 0 1 1 0
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13 1 0.1 12 0 0 0 0 0 1 1 0
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14 1 0.1 13 0 0 0 0 0 1 1 0
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15 1 0.1 14 0 0 0 0 0 1 1 0
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16 1 0.1 15 0 0 0 0 0 1 1 0
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17 1 0.1 16 0 0 0 0 0 1 1 0
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18 1 0.1 17 0 0 0 0 0 1 1 0
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19 1 0.1 18 0 0 0 0 0 1 1 0
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20 1 0.1 19 0 0 0 0 0 1 1 0
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21 1 0.1 20 0 0 0 0 0 1 1 0
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22 1 0.1 21 0 0 0 0 0 1 1 0
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23 1 0.1 22 0 0 0 0 0 1 1 0
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24 1 0.1 23 0 0 0 0 0 1 1 0
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25 1 0.1 24 0 0 0 0 0 1 1 0
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26 1 0.1 25 0 0 0 0 0 1 1 0
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27 1 0.1 26 0 0 0 0 0 1 1 0
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28 1 0.1 27 0 0 0 0 0 1 1 0
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29 1 0.1 28 0 0 0 0 0 1 1 0
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30 1 0.1 29 0 0 0 0 0 1 1 0
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31 1 0.1 30 0 0 0 0 0 1 1 0
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32 1 0.1 31 0 0 0 0 0 1 1 0
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33 1 0.1 32 0 0 0 0 0 1 1 0
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34 1 0.1 33 0 0 0 0 0 1 1 0
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35 1 0.1 34 0 0 0 0 0 1 1 0
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36 1 0.1 35 0 0 0 0 0 1 1 0
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37 1 0.1 36 0 0 0 0 0 1 1 0
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38 1 0.1 37 0 0 0 0 0 1 1 0
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39 1 0.1 38 0 0 0 0 0 1 1 0
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40 1 0.1 39 0 0 0 0 0 1 1 0
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41 1 0.1 40 0 0 0 0 0 1 1 0
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42 1 0.1 41 0 0 0 0 0 1 1 0
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43 1 0.1 42 0 0 0 0 0 1 1 0
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44 1 0.1 43 0 0 0 0 0 1 1 0
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45 1 0.1 44 0 0 0 0 0 1 1 0
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46 1 0.1 45 0 0 0 0 0 1 1 0
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47 1 0.1 46 0 0 0 0 0 1 1 0
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48 1 0.1 47 0 0 0 0 0 1 1 0
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49 1 0.1 48 0 0 0 0 0 1 1 0
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50 1 0.1 49 0 0 0 0 0 1 1 0
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51 1 0.1 50 0 0 0 0 0 1 1 0
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52 1 0.1 51 0 0 0 0 0 1 1 0
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53 1 0.1 52 0 0 0 0 0 1 1 0
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54 1 0.1 53 0 0 0 0 0 1 1 0
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55 1 0.1 54 0 0 0 0 0 1 1 0
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56 1 0.1 55 0 0 0 0 0 1 1 0
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57 1 0.1 56 0 0 0 0 0 1 1 0
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58 1 0.1 57 0 0 0 0 0 1 1 0
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59 1 0.1 58 0 0 0 0 0 1 1 0
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60 1 0.1 59 0 0 0 0 0 1 1 0
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1 1 0.1 0 0 1 0 0 0 0 1 1
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2 1 0.1 1 0 0 0 0 0 0 1 1
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3 1 0.1 2 0 0 0 0 0 0 1 1
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4 1 0.1 3 0 0 0 0 0 0 1 1
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5 1 0.1 4 0 0 0 0 0 0 1 1
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6 1 0.1 5 0 0 0 0 0 0 1 1
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7 1 0.1 6 0 0 0 0 0 0 1 1
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8 1 0.1 7 0 0 0 0 0 0 1 1
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9 1 0.1 8 0 0 0 0 0 0 1 1
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10 1 0.1 9 0 0 0 0 0 0 1 1
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11 1 0.1 10 0 0 0 0 0 0 1 1
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12 1 0.1 11 0 0 0 0 0 0 1 1
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13 1 0.1 12 0 0 0 0 0 0 1 1
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14 1 0.1 13 0 0 0 0 0 0 1 1
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15 1 0.1 14 0 0 0 0 0 0 1 1
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16 1 0.1 15 0 0 0 0 0 0 1 1
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17 1 0.1 16 0 0 0 0 0 0 1 1
|
||||
18 1 0.1 17 0 0 0 0 0 0 1 1
|
||||
19 1 0.1 18 0 0 0 0 0 0 1 1
|
||||
20 1 0.1 19 0 0 0 0 0 0 1 1
|
||||
21 1 0.1 20 0 0 0 0 0 0 1 1
|
||||
22 1 0.1 21 0 0 0 0 0 0 1 1
|
||||
23 1 0.1 22 0 0 0 0 0 0 1 1
|
||||
24 1 0.1 23 0 0 0 0 0 0 1 1
|
||||
25 1 0.1 24 0 0 0 0 0 0 1 1
|
||||
26 1 0.1 25 0 0 0 0 0 0 1 1
|
||||
27 1 0.1 26 0 0 0 0 0 0 1 1
|
||||
28 1 0.1 27 0 0 0 0 0 0 1 1
|
||||
29 1 0.1 28 0 0 0 0 0 0 1 1
|
||||
30 1 0.1 29 0 0 0 0 0 0 1 1
|
||||
31 1 0.1 30 0 0 0 0 0 0 1 1
|
||||
32 1 0.1 31 0 0 0 0 0 0 1 1
|
||||
33 1 0.1 32 0 0 0 0 0 0 1 1
|
||||
34 1 0.1 33 0 0 0 0 0 0 1 1
|
||||
35 1 0.1 34 0 0 0 0 0 0 1 1
|
||||
36 1 0.1 35 0 0 0 0 0 0 1 1
|
||||
37 1 0.1 36 0 0 0 0 0 0 1 1
|
||||
38 1 0.1 37 0 0 0 0 0 0 1 1
|
||||
39 1 0.1 38 0 0 0 0 0 0 1 1
|
||||
40 1 0.1 39 0 0 0 0 0 0 1 1
|
||||
41 1 0.1 40 0 0 0 0 0 0 1 1
|
||||
42 1 0.1 41 0 0 0 0 0 0 1 1
|
||||
43 1 0.1 42 0 0 0 0 0 0 1 1
|
||||
44 1 0.1 43 0 0 0 0 0 0 1 1
|
||||
45 1 0.1 44 0 0 0 0 0 0 1 1
|
||||
46 1 0.1 45 0 0 0 0 0 0 1 1
|
||||
47 1 0.1 46 0 0 0 0 0 0 1 1
|
||||
48 1 0.1 47 0 0 0 0 0 0 1 1
|
||||
49 1 0.1 48 0 0 0 0 0 0 1 1
|
||||
50 1 0.1 49 0 0 0 0 0 0 1 1
|
||||
51 1 0.1 50 0 0 0 0 0 0 1 1
|
||||
52 1 0.1 51 0 0 0 0 0 0 1 1
|
||||
53 1 0.1 52 0 0 0 0 0 0 1 1
|
||||
54 1 0.1 53 0 0 0 0 0 0 1 1
|
||||
55 1 0.1 54 0 0 0 0 0 0 1 1
|
||||
56 1 0.1 55 0 0 0 0 0 0 1 1
|
||||
57 1 0.1 56 0 0 0 0 0 0 1 1
|
||||
58 1 0.1 57 0 0 0 0 0 0 1 1
|
||||
59 1 0.1 58 0 0 0 0 0 0 1 1
|
||||
60 1 0.1 59 0 0 0 0 0 1 1 1
|
||||
|
||||
@@ -1,2 +1,2 @@
|
||||
n amp_x amp_y amp_z freq_x freq_y freq_z phi_x phi_y phi_z period
|
||||
1 0 0 1 0 0 0.1 0 0 90 all
|
||||
1 0.5 0 0 1 0 0 0 0 0 all
|
||||
@@ -5,15 +5,16 @@
|
||||
# ── 流程控制 ──────────────────────────────────
|
||||
# 每步用 0/1 单独开关,1=执行,0=跳过
|
||||
# 依赖关系:抽帧依赖模拟结果,绘图依赖模拟+抽帧
|
||||
step_simulate: 1 # 运行物理模拟 → output/trajectory.txt
|
||||
step_sample: 1 # 抽帧 → output/display.txt
|
||||
step_simulate: 0 # 运行物理模拟 → output/trajectory.txt
|
||||
step_sample: 0 # 抽帧 → output/display.txt
|
||||
step_plot: 0 # 绘制轨迹/能量图 → output/trajectory_plots.png
|
||||
step_animation: 1 # 自动播放 VisPy 3D 动画窗口(需安装 vispy)
|
||||
step_animation: 0 # 自动播放 VisPy 3D 动画窗口(需安装 vispy)
|
||||
step_plot_wave: 1 # 绘制波形图
|
||||
force_calc: 0 # 强制重新计算:1=跳过缓存强算,0=自动使用已有输出
|
||||
|
||||
# ── 计算引擎 ──────────────────────────────────
|
||||
# 可选: python, c, cpp, fortran, java
|
||||
engine: python # 默认使用 Python 引擎
|
||||
engine: python # 默认使用 python 引擎
|
||||
|
||||
# ── 盒子 ──────────────────────────────────────
|
||||
box_a: 80.0 # 立方体半边长,粒子被限制在 [-box_a, box_a]³ 内
|
||||
@@ -60,7 +61,7 @@ warmup_steps: 0 # 默认 0(立即开始记录)
|
||||
|
||||
# 总模拟时间(秒),程序自动计算 NT = T_total / DT
|
||||
# 如果同时指定了 NT,以 NT 为准
|
||||
T_total: 100.0
|
||||
T_total: 10.0
|
||||
|
||||
# 抽帧间隔(每 NSTEP 步取一帧用于动画)
|
||||
NSTEP: 50
|
||||
|
||||
@@ -0,0 +1,42 @@
|
||||
# case05: 一维原子链驱动力学模拟
|
||||
|
||||
60 个原子沿 x 轴排列,相邻原子用弹簧连接。原子 1 受驱动力作用。
|
||||
|
||||
## 物理设定
|
||||
|
||||
| 参数 | 值 |
|
||||
|---|---|
|
||||
| 原子数 | 60 |
|
||||
| 排列 | 沿 x 轴等间距排列,间距为 1 |
|
||||
| 约束 | 原子**只沿 z 方向**振动(fix_x=1, fix_y=1, fix_z=0) |
|
||||
| 弹簧 | 劲度系数 k=1.0,原长 L₀=1.0 |
|
||||
| 重力 | 无 |
|
||||
| 万有引力 | 无 |
|
||||
| 阻尼 | 无 |
|
||||
| 驱动力 | 原子 1(详见 driver.txt) |
|
||||
| 算法 | leapfrog(蛙跳法,能量守恒) |
|
||||
|
||||
## 驱动力
|
||||
|
||||
原子 1 的位置由 `input/driver.txt` 中的驱动力公式决定:
|
||||
|
||||
```math
|
||||
z(t) = A_z \cdot \cos(2\pi f_z t + \phi_z)
|
||||
```
|
||||
|
||||
当前参数:A_z = 5.0, f_z = 1.0 Hz, φ_z = 90°(全程驱动)。
|
||||
|
||||
受驱原子完全忽略 coord.txt 中的初始坐标和 fix 约束,位置/速度由驱动力解析确定。
|
||||
|
||||
## 动力学行为
|
||||
|
||||
原子 1 的受迫振动通过弹簧逐次传递给相邻原子,形成沿链传播的横波。由于横向振动的几何非线性(弹簧张力主要在 x 方向),z 方向有效刚度低,波速较慢,呈现 FPU 型非线性动力学特征。
|
||||
|
||||
## 使用方法
|
||||
|
||||
```bash
|
||||
cd examples/case05
|
||||
python run_dynamics.py
|
||||
```
|
||||
|
||||
配置参数详见 `input/input.txt`,驱动力定义见 `input/driver.txt`,完整文档见 `doc/index.html`。
|
||||
@@ -0,0 +1,473 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="zh-CN">
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<title>case05 — 一维原子链驱动力学模拟 | 物理原理 & 使用文档</title>
|
||||
<style>
|
||||
:root {
|
||||
--bg: #f8f9fa;
|
||||
--card: #fff;
|
||||
--text: #1a1a2e;
|
||||
--accent: #2563eb;
|
||||
--accent-light: #dbeafe;
|
||||
--code-bg: #1e293b;
|
||||
--code-text: #e2e8f0;
|
||||
--border: #e2e8f0;
|
||||
--muted: #64748b;
|
||||
}
|
||||
* { margin: 0; padding: 0; box-sizing: border-box; }
|
||||
body {
|
||||
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
|
||||
background: var(--bg);
|
||||
color: var(--text);
|
||||
line-height: 1.7;
|
||||
}
|
||||
|
||||
/* ── Header ── */
|
||||
.hero {
|
||||
background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
|
||||
color: #fff;
|
||||
padding: 56px 24px 48px;
|
||||
text-align: center;
|
||||
}
|
||||
.hero h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }
|
||||
.hero .subtitle {
|
||||
margin-top: 10px;
|
||||
font-size: 1.05rem;
|
||||
opacity: 0.8;
|
||||
}
|
||||
.hero .badge {
|
||||
display: inline-block;
|
||||
margin-top: 14px;
|
||||
padding: 4px 14px;
|
||||
border-radius: 999px;
|
||||
background: rgba(255,255,255,0.12);
|
||||
font-size: 0.82rem;
|
||||
}
|
||||
|
||||
/* ── Layout ── */
|
||||
.container { max-width: 820px; margin: 0 auto; padding: 32px 20px; }
|
||||
|
||||
section { margin-bottom: 44px; }
|
||||
h2 {
|
||||
font-size: 1.35rem;
|
||||
font-weight: 600;
|
||||
margin-bottom: 16px;
|
||||
padding-bottom: 8px;
|
||||
border-bottom: 2px solid var(--accent);
|
||||
display: inline-block;
|
||||
}
|
||||
h3 {
|
||||
font-size: 1.05rem;
|
||||
font-weight: 600;
|
||||
margin: 20px 0 10px;
|
||||
}
|
||||
|
||||
p, li { margin-bottom: 10px; }
|
||||
ul, ol { padding-left: 22px; }
|
||||
strong { color: var(--accent); }
|
||||
|
||||
/* ── Cards ── */
|
||||
.card {
|
||||
background: var(--card);
|
||||
border-radius: 12px;
|
||||
padding: 20px 24px;
|
||||
margin-bottom: 16px;
|
||||
border: 1px solid var(--border);
|
||||
box-shadow: 0 1px 3px rgba(0,0,0,0.04);
|
||||
}
|
||||
|
||||
/* ── Formula / Code blocks ── */
|
||||
.formula {
|
||||
background: var(--card);
|
||||
border-left: 4px solid var(--accent);
|
||||
padding: 14px 20px;
|
||||
margin: 14px 0;
|
||||
font-family: "Times New Roman", "STIX", serif;
|
||||
font-size: 1.05rem;
|
||||
overflow-x: auto;
|
||||
border-radius: 0 8px 8px 0;
|
||||
}
|
||||
code {
|
||||
background: var(--accent-light);
|
||||
padding: 2px 7px;
|
||||
border-radius: 4px;
|
||||
font-family: "JetBrains Mono", "Fira Code", monospace;
|
||||
font-size: 0.88em;
|
||||
}
|
||||
pre {
|
||||
background: var(--code-bg);
|
||||
color: var(--code-text);
|
||||
padding: 16px 20px;
|
||||
border-radius: 10px;
|
||||
overflow-x: auto;
|
||||
font-size: 0.85rem;
|
||||
line-height: 1.5;
|
||||
margin: 14px 0;
|
||||
}
|
||||
pre .cm { color: #94a3b8; font-style: italic; } /* comment */
|
||||
|
||||
/* ── Table ── */
|
||||
table {
|
||||
width: 100%;
|
||||
border-collapse: collapse;
|
||||
margin: 14px 0;
|
||||
font-size: 0.92rem;
|
||||
}
|
||||
th, td {
|
||||
padding: 8px 12px;
|
||||
text-align: left;
|
||||
border-bottom: 1px solid var(--border);
|
||||
}
|
||||
th { background: var(--accent-light); font-weight: 600; }
|
||||
|
||||
/* ── TOC ── */
|
||||
.toc { counter-reset: toc; }
|
||||
.toc li { counter-increment: toc; list-style: none; margin-bottom: 6px; }
|
||||
.toc li::before { content: counter(toc) ". "; font-weight: 600; color: var(--accent); }
|
||||
.toc a { color: var(--accent); text-decoration: none; }
|
||||
.toc a:hover { text-decoration: underline; }
|
||||
|
||||
/* ── Flow diagram ── */
|
||||
.flow { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: center; margin: 16px 0; }
|
||||
.flow-step {
|
||||
background: var(--accent-light);
|
||||
border: 1px solid var(--accent);
|
||||
border-radius: 8px;
|
||||
padding: 8px 16px;
|
||||
font-size: 0.88rem;
|
||||
font-weight: 500;
|
||||
}
|
||||
.flow-arrow { color: var(--muted); font-size: 1.2rem; }
|
||||
|
||||
@media (max-width: 600px) {
|
||||
.hero h1 { font-size: 1.5rem; }
|
||||
.flow { flex-direction: column; }
|
||||
.flow-arrow { transform: rotate(90deg); }
|
||||
}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- Header -->
|
||||
<!-- ============================================================ -->
|
||||
<header class="hero">
|
||||
<h1>一维原子链驱动力学模拟</h1>
|
||||
<p class="subtitle">60 个原子沿 x 轴排列 · 弹簧连接 · z 方向受迫振动</p>
|
||||
<span class="badge">case05 · examples/case05</span>
|
||||
</header>
|
||||
|
||||
<div class="container">
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- TOC -->
|
||||
<!-- ============================================================ -->
|
||||
<section>
|
||||
<h2>目录</h2>
|
||||
<ol class="toc">
|
||||
<li><a href="#physics">物理原理</a></li>
|
||||
<li><a href="#algorithm">数值算法</a></li>
|
||||
<li><a href="#driver">驱动力模型</a></li>
|
||||
<li><a href="#usage">使用方法</a></li>
|
||||
<li><a href="#params">参数参考</a></li>
|
||||
<li><a href="#files">文件结构</a></li>
|
||||
<li><a href="#troubleshoot">常见问题</a></li>
|
||||
</ol>
|
||||
</section>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- 1. Physics -->
|
||||
<!-- ============================================================ -->
|
||||
<section id="physics">
|
||||
<h2>一、物理原理</h2>
|
||||
|
||||
<div class="card">
|
||||
<h3>1.1 一维原子链</h3>
|
||||
<p>60 个原子沿 <strong>x 轴</strong> 等间距排列,原子间距为 1。相邻原子之间用 <strong>理想弹簧</strong> 连接,弹簧的劲度系数 <em>k</em> = 1.0,原长 <em>L</em>₀ = 1.0(与原子间距一致,初始状态弹簧无拉伸)。</p>
|
||||
<p>每个原子被限制在 <strong>z 方向</strong> 自由振动,x 和 y 方向锁定(<code>fix_x=1, fix_y=1, fix_z=0</code>)。</p>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>1.2 弹簧力(胡克定律)</h3>
|
||||
<p>当原子 <em>i</em> 和 <em>j</em> 之间有弹簧连接时,原子 <em>i</em> 受到的弹簧力为:</p>
|
||||
<div class="formula">
|
||||
<strong>F</strong> = −<em>k</em> · (<em>d</em> − <em>L</em>₀) · <strong>u</strong><sub><em>ij</em></sub>
|
||||
</div>
|
||||
<p>其中 <em>d</em> = |<strong>r</strong><sub><em>j</em></sub> − <strong>r</strong><sub><em>i</em></sub>| 为两原子间距离,<strong>u</strong><sub><em>ij</em></sub> 为从 <em>i</em> 指向 <em>j</em> 的单位向量。由于原子只在 z 方向振动,弹簧在 z 方向的分量是 <strong>几何非线性</strong> 的——对于小振幅近似,z 方向等效于一个三次方恢复力(FPU 型非线性)。</p>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>1.3 运动方程</h3>
|
||||
<p>对于第 <em>i</em> 个自由原子(非受驱),牛顿第二定律给出:</p>
|
||||
<div class="formula">
|
||||
<em>m</em> · <strong>a</strong><sub><em>i</em></sub> = <strong>F</strong><sub><em>i</em></sub><sup>spring</sup> + <strong>F</strong><sub><em>i</em></sub><sup>driving</sup>
|
||||
</div>
|
||||
<p>本案例中 <strong>唯一的外力</strong> 来自驱动力(仅施加于原子 1)。无重力、无万有引力、无阻尼,系统总能量守恒。</p>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>1.4 波传播</h3>
|
||||
<p>原子 1 的受迫振动通过弹簧逐次传递给相邻原子,形成沿链传播的 <strong>横波</strong>。由于横向振动的几何非线性(弹簧大部分张力在 x 方向,z 方向的有效刚度远小于 1),波的传播速度较慢,且高阶频率成分会在链中产生复杂的非线性动力学行为(类似 FPU 回波现象)。</p>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- 2. Algorithm -->
|
||||
<!-- ============================================================ -->
|
||||
<section id="algorithm">
|
||||
<h2>二、数值算法</h2>
|
||||
|
||||
<div class="card">
|
||||
<h3>2.1 蛙跳法(Leapfrog / Velocity-Verlet)</h3>
|
||||
<p>采用能量守恒特性优异的 <strong>蛙跳法</strong>(二阶辛积分器),更新公式为:</p>
|
||||
<div class="formula">
|
||||
<strong>v</strong>(<em>t</em> + ½Δ<em>t</em>) = <strong>v</strong>(<em>t</em>) + ½ <strong>a</strong>(<em>t</em>) · Δ<em>t</em><br>
|
||||
<strong>r</strong>(<em>t</em> + Δ<em>t</em>) = <strong>r</strong>(<em>t</em>) + <strong>v</strong>(<em>t</em> + ½Δ<em>t</em>) · Δ<em>t</em><br>
|
||||
<strong>a</strong>(<em>t</em> + Δ<em>t</em>) = <strong>F</strong>(<strong>r</strong>(<em>t</em> + Δ<em>t</em>), <strong>v</strong>(<em>t</em> + ½Δ<em>t</em>)) / <em>m</em><br>
|
||||
<strong>v</strong>(<em>t</em> + Δ<em>t</em>) = <strong>v</strong>(<em>t</em> + ½Δ<em>t</em>) + ½ <strong>a</strong>(<em>t</em> + Δ<em>t</em>) · Δ<em>t</em>
|
||||
</div>
|
||||
<p>蛙跳法在长时间模拟中能量漂移极小(本案例验证 <strong>< 0.004%</strong>),适合无阻尼的保守系统。</p>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>2.2 时间步长与采样</h3>
|
||||
<table>
|
||||
<tr><th>参数</th><th>值</th><th>说明</th></tr>
|
||||
<tr><td>DT</td><td>0.01 s</td><td>积分步长(远小于 1/ω ≈ 0.16 s,满足稳定性条件)</td></tr>
|
||||
<tr><td>T_total</td><td>100 s</td><td>总模拟时间 → NT = 10000 步</td></tr>
|
||||
<tr><td>NSTEP</td><td>50</td><td>每 NSTEP 步取一帧用于动画 → 200 帧</td></tr>
|
||||
<tr><td>method</td><td>leapfrog</td><td>蛙跳法(Velocity-Verlet)</td></tr>
|
||||
</table>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>2.3 计算流程</h3>
|
||||
<div class="flow">
|
||||
<span class="flow-step">读入 coord.txt<br>connection.txt<br>bond.txt</span>
|
||||
<span class="flow-arrow">→</span>
|
||||
<span class="flow-step">施加驱动力<br>(驱动原子 1)</span>
|
||||
<span class="flow-arrow">→</span>
|
||||
<span class="flow-step">记录轨迹</span>
|
||||
<span class="flow-arrow">→</span>
|
||||
<span class="flow-step">蛙跳法<br>更新位置/速度</span>
|
||||
<span class="flow-arrow">→</span>
|
||||
<span class="flow-step">固定约束<br>(x, y 锁定)</span>
|
||||
<span class="flow-arrow">→</span>
|
||||
<span class="flow-step" style="background:#fef3c7;border-color:#f59e0b;">循环<br>NT 次</span>
|
||||
</div>
|
||||
<p style="margin-top:12px;">注意:驱动力在 <strong>每次积分前</strong> 施加,确保受驱原子的位置正确传递给弹簧力计算。</p>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- 3. Driving Force -->
|
||||
<!-- ============================================================ -->
|
||||
<section id="driver">
|
||||
<h2>三、驱动力模型</h2>
|
||||
|
||||
<div class="card">
|
||||
<h3>3.1 定义文件</h3>
|
||||
<p>驱动力由 <code>input/driver.txt</code> 定义,格式如下:</p>
|
||||
<pre>n amp_x amp_y amp_z freq_x freq_y freq_z phi_x phi_y phi_z period
|
||||
1 0 0 5 0 0 1 0 0 90 all</pre>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>3.2 数学公式</h3>
|
||||
<p>受驱原子的位置由下式决定(<strong>完全替换</strong> coord.txt 中的初始坐标和固定约束):</p>
|
||||
<div class="formula">
|
||||
<strong>r</strong>(<em>t</em>) = <strong>A</strong> · cos(2π<em>f</em> · <em>t</em> + <strong>φ</strong>)
|
||||
</div>
|
||||
<p>速度由解析导数给出:</p>
|
||||
<div class="formula">
|
||||
<strong>v</strong>(<em>t</em>) = −<strong>A</strong> · 2π<em>f</em> · sin(2π<em>f</em> · <em>t</em> + <strong>φ</strong>)
|
||||
</div>
|
||||
<p>其中 <strong>A</strong> = (amp_x, amp_y, amp_z),<strong>f</strong> = (freq_x, freq_y, freq_z) 为不同方向的驱动频率,<strong>φ</strong> = (phi_x, phi_y, phi_z) 为相位(<strong>角度制</strong>,代码自动转换为弧度)。</p>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>3.3 本案例驱动参数</h3>
|
||||
<table>
|
||||
<tr><th>参数</th><th>值</th><th>含义</th></tr>
|
||||
<tr><td>amp_z</td><td>5.0</td><td>z 方向驱动振幅</td></tr>
|
||||
<tr><td>freq_z</td><td>1.0 Hz</td><td>驱动频率(周期 1 s)</td></tr>
|
||||
<tr><td>phi_z</td><td>90°</td><td>驱动相位 → z(0) = 5·cos(90°) = 0</td></tr>
|
||||
<tr><td>period</td><td>all</td><td>全程驱动,永不停止</td></tr>
|
||||
</table>
|
||||
<div class="formula">
|
||||
<em>z</em>(<em>t</em>) = 5.0 · cos(2π · 1.0 · <em>t</em> + 90°)
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>3.4 有限周期驱动</h3>
|
||||
<p><code>period</code> 参数支持三种模式:</p>
|
||||
<ul>
|
||||
<li><strong>all</strong> — 全程驱动</li>
|
||||
<li><strong>数值</strong> — 驱动指定周期数后 <strong>静止</strong>(冻结在最终位置,速度归零)。例如 <code>period: 1</code> 表示驱动 1 个完整周期后停止。</li>
|
||||
</ul>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>3.5 驱动与固定约束的关系</h3>
|
||||
<p>对于受驱原子(<code>driver.txt</code> 中 <code>n</code> 指定的原子),其在 <code>coord.txt</code> 中的初始坐标和 <code>fix_x/fix_y/fix_z</code> 约束被 <strong>完全忽略</strong>。原子的位置和速度完全由驱动力公式决定。</p>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- 4. Usage -->
|
||||
<!-- ============================================================ -->
|
||||
<section id="usage">
|
||||
<h2>四、使用方法</h2>
|
||||
|
||||
<div class="card">
|
||||
<h3>4.1 完整运行(模拟 + 动画)</h3>
|
||||
<pre>cd examples/case05
|
||||
python run_dynamics.py</pre>
|
||||
<p>这步会依次执行:物理模拟 → 抽帧 → 打开 VisPy 3D 动画窗口。</p>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>4.2 仅查看已有结果</h3>
|
||||
<p>如果已经跑完模拟且生成了 <code>output/display.txt</code>,可以通过修改 <code>input.txt</code> 跳过计算,只开动画:</p>
|
||||
<pre>step_simulate: 0 # 跳过模拟
|
||||
step_sample: 0 # 跳过抽帧
|
||||
step_animation: 1 # 播放动画</pre>
|
||||
<p>然后运行:<code>python run_dynamics.py</code></p>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>4.3 手动 3D 动画</h3>
|
||||
<p>也可以单独启动 VisPy 窗口:</p>
|
||||
<pre>python ../../draw.py output/</pre>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>4.4 强制重新计算</h3>
|
||||
<p>修改参数后需要重新运行模拟时,设置:</p>
|
||||
<pre>force_calc: 1 # 忽略缓存,强制重新计算</pre>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>4.5 动画交互</h3>
|
||||
<table>
|
||||
<tr><th>操作</th><th>效果</th></tr>
|
||||
<tr><td>鼠标拖动</td><td>旋转视角</td></tr>
|
||||
<tr><td>滚轮</td><td>缩放</td></tr>
|
||||
<tr><td>A / D 键</td><td>视角向左 / 向右平移</td></tr>
|
||||
<tr><td>W / S 键</td><td>视角向上 / 向下平移</td></tr>
|
||||
<tr><td>Q / E 键</td><td>降低 / 提高平移速度</td></tr>
|
||||
<tr><td>左上角 <strong>reset</strong> 按钮</td><td>复位视角到初始位置</td></tr>
|
||||
<tr><td>左上角 <strong>info</strong> 按钮</td><td>切换信息面板显示/隐藏</td></tr>
|
||||
<tr><td>左上角 <strong>axes</strong> 按钮</td><td>切换坐标轴显示/隐藏</td></tr>
|
||||
</table>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- 5. Parameters -->
|
||||
<!-- ============================================================ -->
|
||||
<section id="params">
|
||||
<h2>五、参数参考</h2>
|
||||
|
||||
<div class="card">
|
||||
<h3>5.1 input.txt 关键参数</h3>
|
||||
<table>
|
||||
<tr><th>参数</th><th>默认值</th><th>说明</th></tr>
|
||||
<tr><td>gravity_field</td><td>0</td><td>均匀重力场(已关闭)</td></tr>
|
||||
<tr><td>gravity_interaction</td><td>0</td><td>原子间万有引力(已关闭)</td></tr>
|
||||
<tr><td>elastic_force</td><td>1</td><td>弹簧键力(已开启)</td></tr>
|
||||
<tr><td>damping_force</td><td>0</td><td>阻尼(已关闭)</td></tr>
|
||||
<tr><td><strong>driving_force</strong></td><td><strong>1</strong></td><td>驱动力开关(1=开启,需 driver.txt)</td></tr>
|
||||
<tr><td>method</td><td>leapfrog</td><td>数值积分方法</td></tr>
|
||||
<tr><td>DT</td><td>0.01</td><td>积分步长 (s)</td></tr>
|
||||
<tr><td>T_total</td><td>100.0</td><td>总模拟时间 (s)</td></tr>
|
||||
<tr><td>NSTEP</td><td>50</td><td>抽帧步数间隔</td></tr>
|
||||
<tr><td>engine</td><td>python</td><td>计算引擎(python / c / cpp / fortran)</td></tr>
|
||||
<tr><td>use_marker</td><td>1</td><td>渲染模式(0=Sphere 网格, 1=Marker GPU 实例化)</td></tr>
|
||||
</table>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>5.2 流程控制参数</h3>
|
||||
<table>
|
||||
<tr><th>参数</th><th>0</th><th>1</th></tr>
|
||||
<tr><td>step_simulate</td><td>跳过模拟(加载已有轨迹)</td><td>运行物理模拟</td></tr>
|
||||
<tr><td>step_sample</td><td>跳过抽帧</td><td>从轨迹抽取显示帧</td></tr>
|
||||
<tr><td>step_plot</td><td>不生成图表</td><td>生成轨迹/能量图</td></tr>
|
||||
<tr><td>step_animation</td><td>不启动动画</td><td>自动打开 VisPy 3D 窗口</td></tr>
|
||||
<tr><td>force_calc</td><td>自动检测缓存</td><td>强制重新计算</td></tr>
|
||||
</table>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- 6. File Structure -->
|
||||
<!-- ============================================================ -->
|
||||
<section id="files">
|
||||
<h2>六、文件结构</h2>
|
||||
|
||||
<pre>case05/
|
||||
├── input/
|
||||
│ ├── input.txt # 主配置文件(YAML 格式)
|
||||
│ ├── coord.txt # 原子坐标(60 个原子)
|
||||
│ ├── connection.txt # 弹簧连接关系(59 条键)
|
||||
│ ├── bond.txt # 弹簧参数(k=1.0, L₀=1.0)
|
||||
│ └── <strong>driver.txt</strong> # <span class="cm">驱动力定义(本案例新增)</span>
|
||||
├── output/
|
||||
│ ├── trajectory.txt # 全量轨迹数据(10000 步 × 60 原子)
|
||||
│ ├── display.txt # 抽帧后的动画数据(200 帧 × 60 原子)
|
||||
│ ├── dynamics.log # 计算日志
|
||||
│ └── animation.log # 动画启动日志(闪退时排查用)
|
||||
├── doc/
|
||||
│ └── index.html # <span class="cm">本文档</span>
|
||||
├── Readme.md # 案例简介
|
||||
└── run_dynamics.py # 案例运行入口</pre>
|
||||
</section>
|
||||
|
||||
<!-- ============================================================ -->
|
||||
<!-- 7. Troubleshooting -->
|
||||
<!-- ============================================================ -->
|
||||
<section id="troubleshoot">
|
||||
<h2>七、常见问题</h2>
|
||||
|
||||
<div class="card">
|
||||
<h3>7.1 动画窗口闪退</h3>
|
||||
<p>如果 VisPy 窗口一闪就消失,请检查:</p>
|
||||
<ul>
|
||||
<li><code>output/animation.log</code> 中是否有错误信息</li>
|
||||
<li><code>output/display.txt</code> 是否存在(需先跑 <code>step_sample: 1</code>)</li>
|
||||
</ul>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>7.2 原子不振动</h3>
|
||||
<p>可能原因:</p>
|
||||
<ul>
|
||||
<li><strong>NSTEP 过大</strong>:抽帧间隔大于驱动周期的一半时,动画会丢失振动细节。建议 NSTEP ≤ 1/(freq · DT · 10)</li>
|
||||
<li><strong>相位 φ 使采样点落在零值</strong>:试试 <code>phi_z: 0</code> 让原子在 t=0 处于振幅峰值</li>
|
||||
<li>确认 <code>driving_force: 1</code> 且 <code>driver.txt</code> 中 amp_z 不为 0</li>
|
||||
</ul>
|
||||
</div>
|
||||
|
||||
<div class="card">
|
||||
<h3>7.3 渲染性能慢</h3>
|
||||
<p>原子数多时动画卡顿:</p>
|
||||
<ul>
|
||||
<li>设置 <code>use_marker: 1</code>(使用 GPU 实例化渲染替代独立网格球体)</li>
|
||||
<li>增大 <code>NSTEP</code> 减少动画帧数</li>
|
||||
</ul>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<hr style="border:none;border-top:1px solid var(--border);margin:40px 0;">
|
||||
|
||||
<footer style="text-align:center;color:var(--muted);font-size:0.85rem;margin-bottom:40px;">
|
||||
Dynamics Simulation Framework · 生成于 2026-06-10
|
||||
</footer>
|
||||
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,2 @@
|
||||
bond_name k rest_length
|
||||
k1 100.0 1.0
|
||||
@@ -0,0 +1,60 @@
|
||||
n1 n2 bond_name
|
||||
1 2 k1
|
||||
2 3 k1
|
||||
3 4 k1
|
||||
4 5 k1
|
||||
5 6 k1
|
||||
6 7 k1
|
||||
7 8 k1
|
||||
8 9 k1
|
||||
9 10 k1
|
||||
10 11 k1
|
||||
11 12 k1
|
||||
12 13 k1
|
||||
13 14 k1
|
||||
14 15 k1
|
||||
15 16 k1
|
||||
16 17 k1
|
||||
17 18 k1
|
||||
18 19 k1
|
||||
19 20 k1
|
||||
20 21 k1
|
||||
21 22 k1
|
||||
22 23 k1
|
||||
23 24 k1
|
||||
24 25 k1
|
||||
25 26 k1
|
||||
26 27 k1
|
||||
27 28 k1
|
||||
28 29 k1
|
||||
29 30 k1
|
||||
30 31 k1
|
||||
31 32 k1
|
||||
32 33 k1
|
||||
33 34 k1
|
||||
34 35 k1
|
||||
35 36 k1
|
||||
36 37 k1
|
||||
37 38 k1
|
||||
38 39 k1
|
||||
39 40 k1
|
||||
40 41 k1
|
||||
41 42 k1
|
||||
42 43 k1
|
||||
43 44 k1
|
||||
44 45 k1
|
||||
45 46 k1
|
||||
46 47 k1
|
||||
47 48 k1
|
||||
48 49 k1
|
||||
49 50 k1
|
||||
50 51 k1
|
||||
51 52 k1
|
||||
52 53 k1
|
||||
53 54 k1
|
||||
54 55 k1
|
||||
55 56 k1
|
||||
56 57 k1
|
||||
57 58 k1
|
||||
58 59 k1
|
||||
59 60 k1
|
||||
@@ -0,0 +1,61 @@
|
||||
n mass radius x y z vx vy vz fix_x fix_y fix_z
|
||||
1 1 0.1 0 0 1 0 0 0 0 1 1
|
||||
2 1 0.1 1 0 0 0 0 0 0 1 1
|
||||
3 1 0.1 2 0 0 0 0 0 0 1 1
|
||||
4 1 0.1 3 0 0 0 0 0 0 1 1
|
||||
5 1 0.1 4 0 0 0 0 0 0 1 1
|
||||
6 1 0.1 5 0 0 0 0 0 0 1 1
|
||||
7 1 0.1 6 0 0 0 0 0 0 1 1
|
||||
8 1 0.1 7 0 0 0 0 0 0 1 1
|
||||
9 1 0.1 8 0 0 0 0 0 0 1 1
|
||||
10 1 0.1 9 0 0 0 0 0 0 1 1
|
||||
11 1 0.1 10 0 0 0 0 0 0 1 1
|
||||
12 1 0.1 11 0 0 0 0 0 0 1 1
|
||||
13 1 0.1 12 0 0 0 0 0 0 1 1
|
||||
14 1 0.1 13 0 0 0 0 0 0 1 1
|
||||
15 1 0.1 14 0 0 0 0 0 0 1 1
|
||||
16 1 0.1 15 0 0 0 0 0 0 1 1
|
||||
17 1 0.1 16 0 0 0 0 0 0 1 1
|
||||
18 1 0.1 17 0 0 0 0 0 0 1 1
|
||||
19 1 0.1 18 0 0 0 0 0 0 1 1
|
||||
20 1 0.1 19 0 0 0 0 0 0 1 1
|
||||
21 1 0.1 20 0 0 0 0 0 0 1 1
|
||||
22 1 0.1 21 0 0 0 0 0 0 1 1
|
||||
23 1 0.1 22 0 0 0 0 0 0 1 1
|
||||
24 1 0.1 23 0 0 0 0 0 0 1 1
|
||||
25 1 0.1 24 0 0 0 0 0 0 1 1
|
||||
26 1 0.1 25 0 0 0 0 0 0 1 1
|
||||
27 1 0.1 26 0 0 0 0 0 0 1 1
|
||||
28 1 0.1 27 0 0 0 0 0 0 1 1
|
||||
29 1 0.1 28 0 0 0 0 0 0 1 1
|
||||
30 1 0.1 29 0 0 0 0 0 0 1 1
|
||||
31 1 0.1 30 0 0 0 0 0 0 1 1
|
||||
32 1 0.1 31 0 0 0 0 0 0 1 1
|
||||
33 1 0.1 32 0 0 0 0 0 0 1 1
|
||||
34 1 0.1 33 0 0 0 0 0 0 1 1
|
||||
35 1 0.1 34 0 0 0 0 0 0 1 1
|
||||
36 1 0.1 35 0 0 0 0 0 0 1 1
|
||||
37 1 0.1 36 0 0 0 0 0 0 1 1
|
||||
38 1 0.1 37 0 0 0 0 0 0 1 1
|
||||
39 1 0.1 38 0 0 0 0 0 0 1 1
|
||||
40 1 0.1 39 0 0 0 0 0 0 1 1
|
||||
41 1 0.1 40 0 0 0 0 0 0 1 1
|
||||
42 1 0.1 41 0 0 0 0 0 0 1 1
|
||||
43 1 0.1 42 0 0 0 0 0 0 1 1
|
||||
44 1 0.1 43 0 0 0 0 0 0 1 1
|
||||
45 1 0.1 44 0 0 0 0 0 0 1 1
|
||||
46 1 0.1 45 0 0 0 0 0 0 1 1
|
||||
47 1 0.1 46 0 0 0 0 0 0 1 1
|
||||
48 1 0.1 47 0 0 0 0 0 0 1 1
|
||||
49 1 0.1 48 0 0 0 0 0 0 1 1
|
||||
50 1 0.1 49 0 0 0 0 0 0 1 1
|
||||
51 1 0.1 50 0 0 0 0 0 0 1 1
|
||||
52 1 0.1 51 0 0 0 0 0 0 1 1
|
||||
53 1 0.1 52 0 0 0 0 0 0 1 1
|
||||
54 1 0.1 53 0 0 0 0 0 0 1 1
|
||||
55 1 0.1 54 0 0 0 0 0 0 1 1
|
||||
56 1 0.1 55 0 0 0 0 0 0 1 1
|
||||
57 1 0.1 56 0 0 0 0 0 0 1 1
|
||||
58 1 0.1 57 0 0 0 0 0 0 1 1
|
||||
59 1 0.1 58 0 0 0 0 0 0 1 1
|
||||
60 1 0.1 59 0 0 0 0 0 1 1 1
|
||||
@@ -0,0 +1,2 @@
|
||||
n amp_x amp_y amp_z freq_x freq_y freq_z phi_x phi_y phi_z period
|
||||
1 0.5 0 0 0.1 0 0 0 0 0 all
|
||||
@@ -0,0 +1,96 @@
|
||||
# 物理模拟参数配置
|
||||
# 格式:YAML
|
||||
# 用法:python run_dynamics.py
|
||||
|
||||
# ── 流程控制 ──────────────────────────────────
|
||||
# 每步用 0/1 单独开关,1=执行,0=跳过
|
||||
# 依赖关系:抽帧依赖模拟结果,绘图依赖模拟+抽帧
|
||||
step_simulate: 1 # 运行物理模拟 → output/trajectory.txt
|
||||
step_sample: 1 # 抽帧 → output/display.txt
|
||||
step_plot: 0 # 绘制轨迹/能量图 → output/trajectory_plots.png
|
||||
step_animation: 1 # 自动播放 VisPy 3D 动画窗口(需安装 vispy)
|
||||
force_calc: 0 # 强制重新计算:1=跳过缓存强算,0=自动使用已有输出
|
||||
|
||||
# ── 计算引擎 ──────────────────────────────────
|
||||
# 可选: python, c, cpp, fortran, java
|
||||
engine: python # 默认使用 python 引擎
|
||||
|
||||
# ── 盒子 ──────────────────────────────────────
|
||||
box_a: 80.0 # 立方体半边长,粒子被限制在 [-box_a, box_a]³ 内
|
||||
|
||||
# ── 初始构型 ──────────────────────────────────
|
||||
# 坐标文件格式:
|
||||
# 第一行:n mass radius x y z vx vy vz fix_x fix_y fix_z
|
||||
# 后续行:原子序号 质量 半径 x y z vx vy vz fix_x fix_y fix_z
|
||||
coord_file: input/coord.txt
|
||||
connection_file: input/connection.txt
|
||||
bond_file: input/bond.txt
|
||||
driver_file: input/driver.txt # 驱动力定义文件(driving_force=1 时生效)
|
||||
|
||||
# 绘图/动画展示的原子序号(对应 coord_file 第一列 n)
|
||||
plot_atom: 1
|
||||
|
||||
# ── 物理参数 ──────────────────────────────────
|
||||
# 三个方向分量分别对应 x, y, z
|
||||
G: [0.0, 0.0, 0.0] # 重力场分量 (m/s²)
|
||||
B: [0.0, 0.0, 0.0] # 阻尼分量
|
||||
|
||||
# ── 力开关(0=关闭, 1=开启)──────────────────
|
||||
gravity_field: 0 # 均匀重力场 (G)
|
||||
gravity_interaction: 0 # 原子间万有引力
|
||||
elastic_force: 1 # 弹簧键力
|
||||
damping_force: 0 # 阻尼 (B)
|
||||
driving_force: 1 # 驱动力(需 driver_file 定义)
|
||||
#
|
||||
gravity_strength: 1.0 # 万有引力强度(仅 gravity_interaction=1 时有效)
|
||||
|
||||
# ── 数值算法 ──────────────────────────────────
|
||||
# 可选:
|
||||
# explicit_euler 显式欧拉法
|
||||
# implicit_euler 隐式欧拉法
|
||||
# midpoint 中点法
|
||||
# leapfrog 蛙跳法
|
||||
method: leapfrog
|
||||
|
||||
# ── 步骤控制 ──────────────────────────────────
|
||||
# 以下参数控制哪些步骤被执行和保存
|
||||
|
||||
# 预热步数:模拟开始时跳过不保存的步数(用于稳定初始状态)
|
||||
warmup_steps: 0 # 默认 0(立即开始记录)
|
||||
|
||||
# 总模拟时间(秒),程序自动计算 NT = T_total / DT
|
||||
# 如果同时指定了 NT,以 NT 为准
|
||||
T_total: 50.0
|
||||
|
||||
# 抽帧间隔(每 NSTEP 步取一帧用于动画)
|
||||
NSTEP: 50
|
||||
|
||||
# ── 时间步长 ──────────────────────────────────
|
||||
DT: 0.001 # 时间步长 (s)
|
||||
|
||||
# 抽帧范围:只保存 [sample_start, sample_end) 区间内的帧
|
||||
sample_start: null # null 表示从头开始(帧索引从 0 起)
|
||||
sample_end: null # null 表示到末尾
|
||||
|
||||
|
||||
|
||||
# ── 渲染方式 ──────────────────────────────────
|
||||
# 3D 动画中原子渲染方式:
|
||||
# 0 = Sphere (网格球体,效果精细,原子数少时推荐)
|
||||
# 1 = Marker (GPU 实例化点,原子数多时性能更佳)
|
||||
use_marker: 1
|
||||
|
||||
# ── 显示参数 ──────────────────────────────────
|
||||
# 盒子透明度:单个数值(统一)或 6 个数的数组,按 [-x,+x,-y,+y,-z,+z] 顺序
|
||||
alpha: [0.0, 0.0, 0.0, 0.0, 0.0, 0.5]
|
||||
|
||||
# 小球颜色
|
||||
# 小球半径从 coord_file 的 radius 列读取
|
||||
ball_color_r: 0.20 # R 分量 (0~1)
|
||||
ball_color_g: 0.60 # G 分量
|
||||
ball_color_b: 0.90 # B 分量
|
||||
|
||||
# 盒子面颜色
|
||||
box_color_r: 0.80
|
||||
box_color_g: 0.80
|
||||
box_color_b: 0.85
|
||||
@@ -0,0 +1,54 @@
|
||||
"""
|
||||
Case runner for Dynamics case05 — 1D atomic chain.
|
||||
|
||||
This script keeps program and data separated:
|
||||
- program: ../../dynamics.py
|
||||
- input: ./input
|
||||
- output: ./output
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import argparse
|
||||
import importlib.util
|
||||
from pathlib import Path
|
||||
|
||||
|
||||
CASE_DIR = Path(__file__).resolve().parent
|
||||
DYNAMICS_PATH = Path("..") / ".." / "dynamics.py"
|
||||
INPUT_DIR = Path("input")
|
||||
OUTPUT_DIR = Path("output")
|
||||
CONFIG_FILE = INPUT_DIR / "input.txt"
|
||||
|
||||
|
||||
def load_dynamics_module(module_path: Path):
|
||||
spec = importlib.util.spec_from_file_location("dynamics_module", module_path)
|
||||
if spec is None or spec.loader is None:
|
||||
raise ImportError(f"无法加载 dynamics.py: {module_path}")
|
||||
module = importlib.util.module_from_spec(spec)
|
||||
spec.loader.exec_module(module)
|
||||
return module
|
||||
|
||||
|
||||
def main():
|
||||
parser = argparse.ArgumentParser(description="运行 Dynamics 示例案例 case01")
|
||||
parser.add_argument("--no-plot", action="store_true", help="跳过 matplotlib 绘图")
|
||||
args = parser.parse_args()
|
||||
|
||||
dynamics_path = (CASE_DIR / DYNAMICS_PATH).resolve()
|
||||
input_dir = (CASE_DIR / INPUT_DIR).resolve()
|
||||
output_dir = (CASE_DIR / OUTPUT_DIR).resolve()
|
||||
config_path = (CASE_DIR / CONFIG_FILE).resolve()
|
||||
|
||||
module = load_dynamics_module(dynamics_path)
|
||||
module.run_case(
|
||||
config_path=config_path,
|
||||
runtime_base=CASE_DIR,
|
||||
input_dir=input_dir,
|
||||
output_dir=output_dir,
|
||||
no_plot=args.no_plot,
|
||||
)
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
+260
@@ -0,0 +1,260 @@
|
||||
"""
|
||||
plot_wave.py
|
||||
============
|
||||
波形与能量动态图:读取 display.txt,绘制原子位移波形
|
||||
(纵波 + 2 个横波)和系统能量/输入功率随时间变化的二维动画。
|
||||
|
||||
用法:
|
||||
python plot_wave.py # 使用 dynamics 根目录下 output/
|
||||
python plot_wave.py examples/case05/output # 指定案例输出目录
|
||||
"""
|
||||
|
||||
import numpy as np
|
||||
import matplotlib.pyplot as plt
|
||||
from matplotlib.animation import FuncAnimation
|
||||
import os
|
||||
import sys
|
||||
|
||||
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
|
||||
import compute
|
||||
|
||||
|
||||
def load_disp_data(output_dir):
|
||||
"""加载 display.txt"""
|
||||
disp_path = os.path.join(output_dir, "display.txt")
|
||||
if not os.path.exists(disp_path):
|
||||
raise FileNotFoundError(f"找不到 {disp_path}")
|
||||
return compute.load_text_data(disp_path)
|
||||
|
||||
|
||||
def compute_energy(x, y, z, vx, vy, vz, masses, mass_arr,
|
||||
bond_pairs, bond_stiffness, bond_rest_lengths,
|
||||
gravity_field, G, gravity_interaction, gravity_strength):
|
||||
"""计算系统各能量分量。
|
||||
|
||||
Returns:
|
||||
ek_sys: 系统动能 (n_frames,)
|
||||
us_sys: 系统弹性势能 (n_frames,)
|
||||
ug_sys: 系统重力势能 (n_frames,)
|
||||
ugr_sys: 系统万有引力势能 (n_frames,)
|
||||
"""
|
||||
n_frames = x.shape[0]
|
||||
masses_2d = masses[np.newaxis, :] # (1, n_atoms)
|
||||
|
||||
# 动能 Ek = ½ m v²
|
||||
ek = 0.5 * masses_2d * (vx**2 + vy**2 + vz**2)
|
||||
ek_sys = np.sum(ek, axis=1)
|
||||
|
||||
# 弹性势能 Us = ½ k (d - d₀)²
|
||||
us_sys = np.zeros(n_frames)
|
||||
if bond_pairs is not None and len(bond_pairs) > 0:
|
||||
for b_idx in range(len(bond_pairs)):
|
||||
i, j = bond_pairs[b_idx]
|
||||
dx = x[:, j] - x[:, i]
|
||||
dy = y[:, j] - y[:, i]
|
||||
dz = z[:, j] - z[:, i]
|
||||
dist = np.sqrt(dx**2 + dy**2 + dz**2)
|
||||
stretch = dist - bond_rest_lengths[b_idx]
|
||||
us_sys += 0.5 * bond_stiffness[b_idx] * stretch**2
|
||||
|
||||
# 均匀重力场势能 Ug = -m G·r
|
||||
ug_sys = np.zeros(n_frames)
|
||||
if gravity_field:
|
||||
G_vec = np.array(G)
|
||||
ug_sys = -masses_2d * (G_vec[0] * x + G_vec[1] * y + G_vec[2] * z)
|
||||
ug_sys = np.sum(ug_sys, axis=1)
|
||||
|
||||
# 万有引力势能 Ug_grav = -G_grav Σ m_i m_j / r
|
||||
ugr_sys = np.zeros(n_frames)
|
||||
if gravity_interaction:
|
||||
n_atoms = len(masses)
|
||||
# 为避免巨大计算量,仅当原子数较少时计算
|
||||
if n_atoms <= 200:
|
||||
for i in range(n_atoms):
|
||||
for j in range(i + 1, n_atoms):
|
||||
dx = x[:, j] - x[:, i]
|
||||
dy = y[:, j] - y[:, i]
|
||||
dz = z[:, j] - z[:, i]
|
||||
dist = np.sqrt(dx**2 + dy**2 + dz**2)
|
||||
dist = np.maximum(dist, 1e-12)
|
||||
pair_pe = -gravity_strength * masses[i] * masses[j] / dist
|
||||
ugr_sys += pair_pe
|
||||
|
||||
return ek_sys, us_sys, ug_sys, ugr_sys
|
||||
|
||||
|
||||
def plot_wave(output_dir):
|
||||
"""主绘图函数:读取 display.txt 并生成波形+能量动画。"""
|
||||
data = load_disp_data(output_dir)
|
||||
|
||||
n_frames = int(data["n_frames"])
|
||||
t = np.array(data["disp_t"])
|
||||
|
||||
# 位置 / 速度
|
||||
x = np.array(data["disp_all_x"])
|
||||
y = np.array(data["disp_all_y"])
|
||||
z = np.array(data["disp_all_z"])
|
||||
vx = np.array(data["disp_all_vx"])
|
||||
vy = np.array(data["disp_all_vy"])
|
||||
vz = np.array(data["disp_all_vz"])
|
||||
|
||||
# 原子信息
|
||||
pos_0 = np.array(data["atom_positions"]) # (n_atoms, 3)
|
||||
masses = np.array(data["atom_masses"])
|
||||
atom_ids = np.array(data["atom_ids"])
|
||||
n_atoms = len(atom_ids)
|
||||
|
||||
# 成键
|
||||
bond_pairs = data.get("bond_pairs", [])
|
||||
bond_stiffness = np.array(data.get("bond_stiffness", []))
|
||||
bond_rest_lengths = np.array(data.get("bond_rest_lengths", []))
|
||||
|
||||
# 物理开关
|
||||
gravity_field = int(data.get("gravity_field", 0))
|
||||
gravity_interaction = int(data.get("gravity_interaction", 0))
|
||||
G = data.get("G", [0, 0, 0])
|
||||
gravity_strength = float(data.get("gravity_strength", 1.0))
|
||||
driving_force = int(data.get("driving_force", 0))
|
||||
|
||||
# ── 位移(偏离初始平衡位形)──
|
||||
dx = x - pos_0[np.newaxis, :, 0] # 纵波(沿链方向 x)
|
||||
dy = y - pos_0[np.newaxis, :, 1] # 横波 1(y 方向)
|
||||
dz = z - pos_0[np.newaxis, :, 2] # 横波 2(z 方向)
|
||||
|
||||
# ── 能量 ──
|
||||
ek, us, ug, ugr = compute_energy(
|
||||
x, y, z, vx, vy, vz, masses, masses,
|
||||
bond_pairs, bond_stiffness, bond_rest_lengths,
|
||||
gravity_field, G, gravity_interaction, gravity_strength)
|
||||
e_total = ek + us + ug + ugr
|
||||
power = np.gradient(e_total, t) # 输入功率 = dE/dt
|
||||
|
||||
# ── 波形纵轴范围(全局统一,避免抖动)──
|
||||
def get_ylim(disp_data):
|
||||
vmax = np.max(np.abs(disp_data))
|
||||
if vmax < 1e-10:
|
||||
return -1.0, 1.0
|
||||
margin = vmax * 0.2
|
||||
return -vmax - margin, vmax + margin
|
||||
|
||||
ylims = [get_ylim(dx), get_ylim(dy), get_ylim(dz)]
|
||||
e_max = max(np.max(e_total), 0.01) * 1.3
|
||||
p_abs = np.max(np.abs(power))
|
||||
p_max = max(p_abs * 1.3, 0.01)
|
||||
|
||||
atom_idx = np.arange(n_atoms)
|
||||
|
||||
# ── 图形设置 ──
|
||||
plt.rcParams['font.sans-serif'] = ['Microsoft YaHei', 'SimHei', 'DejaVu Sans']
|
||||
plt.rcParams['axes.unicode_minus'] = False
|
||||
|
||||
fig, axes = plt.subplots(2, 2, figsize=(14, 10))
|
||||
fig.suptitle("波形与能量分析", fontsize=16)
|
||||
|
||||
# ── 3 个波形子图 ──
|
||||
titles = [
|
||||
"纵波 (x 方向位移)",
|
||||
"横波 (y 方向位移)",
|
||||
"横波 (z 方向位移)",
|
||||
]
|
||||
colors = ["#2563eb", "#ea580c", "#16a34a"]
|
||||
wave_configs = list(zip(
|
||||
[axes[0, 0], axes[0, 1], axes[1, 0]],
|
||||
[dx, dy, dz], titles, colors, ylims
|
||||
))
|
||||
|
||||
wave_lines = []
|
||||
time_texts = []
|
||||
for ax, disp, title, color, yl in wave_configs:
|
||||
ax.set_xlim(0, n_atoms - 1)
|
||||
ax.set_ylim(yl)
|
||||
ax.set_xlabel("原子序号")
|
||||
ax.set_ylabel("位移")
|
||||
ax.set_title(title)
|
||||
ax.grid(True, alpha=0.3)
|
||||
line, = ax.plot([], [], color=color, linewidth=1.5)
|
||||
wave_lines.append(line)
|
||||
tt = ax.text(0.02, 0.95, "", transform=ax.transAxes,
|
||||
fontsize=11, verticalalignment="top")
|
||||
time_texts.append(tt)
|
||||
|
||||
# ── 能量+功率子图 ──
|
||||
ax_ep = axes[1, 1]
|
||||
ax_ep.set_xlim(t[0], t[-1])
|
||||
ep_ylow = min(-0.1 * max(e_max, p_max), -p_max * 0.1)
|
||||
ep_yhigh = max(e_max, p_max)
|
||||
ax_ep.set_ylim(ep_ylow, ep_yhigh)
|
||||
ax_ep.set_xlabel("时间 (s)")
|
||||
ax_ep.set_ylabel("能量 / 功率")
|
||||
ax_ep.set_title("系统能量与输入功率")
|
||||
ax_ep.grid(True, alpha=0.3)
|
||||
|
||||
line_ek, = ax_ep.plot([], [], "b-", lw=1.5, label="动能")
|
||||
line_us, = ax_ep.plot([], [], "orange", lw=1.5, label="弹性势能")
|
||||
line_et, = ax_ep.plot([], [], "r--", lw=1.5, label="总能量")
|
||||
line_pw, = ax_ep.plot([], [], "g-", lw=1.5, alpha=0.7, label="输入功率 (dE/dt)")
|
||||
if gravity_field:
|
||||
line_ug, = ax_ep.plot([], [], "purple", lw=1.0, alpha=0.5, label="重力势能")
|
||||
else:
|
||||
line_ug = None
|
||||
if gravity_interaction and n_atoms <= 200:
|
||||
line_ugr, = ax_ep.plot([], [], "brown", lw=1.0, alpha=0.5, label="万有引力势能")
|
||||
else:
|
||||
line_ugr = None
|
||||
|
||||
ax_ep.legend(loc="upper right", fontsize=9)
|
||||
|
||||
plt.tight_layout(rect=[0, 0, 1, 0.95])
|
||||
|
||||
# ── 动画更新 ──
|
||||
def update(frame):
|
||||
# 波形
|
||||
for i in range(3):
|
||||
wave_lines[i].set_data(atom_idx, [dx, dy, dz][i][frame])
|
||||
time_texts[i].set_text(f"t = {t[frame]:.2f} s | 帧 {frame+1}/{n_frames}")
|
||||
|
||||
# 能量(累计到当前帧)
|
||||
cur_t = t[:frame + 1]
|
||||
line_ek.set_data(cur_t, ek[:frame + 1])
|
||||
line_us.set_data(cur_t, us[:frame + 1])
|
||||
line_et.set_data(cur_t, e_total[:frame + 1])
|
||||
line_pw.set_data(cur_t, power[:frame + 1])
|
||||
if line_ug:
|
||||
line_ug.set_data(cur_t, ug[:frame + 1])
|
||||
if line_ugr:
|
||||
line_ugr.set_data(cur_t, ugr[:frame + 1])
|
||||
|
||||
# 能量图 x 轴动态扩展
|
||||
ax_ep.set_xlim(t[0], max(t[frame] + max(t[-1] * 0.05, 1), t[-1]))
|
||||
|
||||
artists = wave_lines + time_texts + [line_ek, line_us, line_et, line_pw]
|
||||
if line_ug: artists.append(line_ug)
|
||||
if line_ugr: artists.append(line_ugr)
|
||||
return artists
|
||||
|
||||
ani = FuncAnimation(fig, update, frames=n_frames, interval=50, blit=True)
|
||||
|
||||
# 保存 GIF
|
||||
gif_path = os.path.join(output_dir, "wave_animation.gif")
|
||||
ani.save(gif_path, writer="pillow", fps=min(20, max(1, n_frames // 5)))
|
||||
print(f"[plot_wave] GIF 已保存: {gif_path}")
|
||||
|
||||
# 尝试保存 MP4
|
||||
try:
|
||||
mp4_path = os.path.join(output_dir, "wave_animation.mp4")
|
||||
ani.save(mp4_path, writer="ffmpeg", fps=min(20, max(1, n_frames // 5)))
|
||||
print(f"[plot_wave] MP4 已保存: {mp4_path}")
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
plt.show()
|
||||
return gif_path
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
script_dir = os.path.dirname(os.path.abspath(__file__))
|
||||
if len(sys.argv) > 1:
|
||||
output_dir = os.path.abspath(sys.argv[1])
|
||||
else:
|
||||
output_dir = compute.get_output_dir(script_dir)
|
||||
plot_wave(output_dir)
|
||||
Reference in New Issue
Block a user