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| """ OOP 碰撞测试场景模拟
前倾 OOP: 驾驶员前倾至距方向盘 10-15cm 碰撞后: 安全气囊展开 → 前倾乘员与气囊交互 """
import numpy as np from dataclasses import dataclass from typing import Tuple, List
@dataclass class CrashTestConfig: """碰撞测试配置""" rear_impact_speed: float = 50.0 frontal_impact_speed: float = 56.0 dummy_type: str = "Hybrid III 50th percentile male" n_dummies: int = 6 oop_lean_distance: float = 0.15 n_accelerometers: int = 12 n_force_sensors: int = 8 n_high_speed_cameras: int = 6 sample_rate: int = 10000
class OOPCrashAnalysis: """ OOP 碰撞伤害分析 对比标准坐姿 vs OOP 前倾在碰撞中的伤害指标 """ THRESHOLDS = { 'head_injury_hic15': 700, 'neck_injury_nij': 1.0, 'chest_accel_3ms': 60, 'chest_deflection': 50, 'femur_force': 10_000, } def __init__(self): self.config = CrashTestConfig() def simulate_hic15(self, accel: np.ndarray, dt: float = 0.0001) -> float: """ Head Injury Criterion (HIC15) Args: accel: 头部加速度 (g), shape=(N,) dt: 时间步长 Returns: hic: HIC15 值 """ window = int(0.015 / dt) max_hic = 0 for i in range(len(accel) - window): a = accel[i:i+window] t = np.arange(window) * dt integral = np.trapz(a, t) avg = integral / (t[-1] - t[0]) hic = (t[-1] - t[0]) * (avg ** 2.5) max_hic = max(max_hic, hic) return max_hic def simulate_nij(self, neck_force: np.ndarray, neck_moment: np.ndarray) -> float: """ Neck Injury Criterion (Nij) Nij = Fz/Fzc + My/Myc """ Fzc = 4500 Myc = 310 nij = np.abs(neck_force / Fzc) + np.abs(neck_moment / Myc) return float(np.max(nij)) def compare_standard_vs_oop(self) -> dict: """对比标准坐姿 vs OOP 前倾""" np.random.seed(42) t = np.arange(0, 0.1, 0.0001) std_head_accel = 50 * np.exp(-t * 30) * np.sin(2 * np.pi * 50 * t) std_neck_force = 3000 * np.exp(-t * 25) std_neck_moment = 150 * np.exp(-t * 25) oop_head_accel = 80 * np.exp(-t * 20) * np.sin(2 * np.pi * 40 * t) oop_neck_force = 4800 * np.exp(-t * 18) oop_neck_moment = 280 * np.exp(-t * 18) std_hic = self.simulate_hic15(std_head_accel) oop_hic = self.simulate_hic15(oop_head_accel) std_nij = self.simulate_nij(std_neck_force, std_neck_moment) oop_nij = self.simulate_nij(oop_neck_force, oop_neck_moment) return { 'standard': { 'HIC15': std_hic, 'Nij': std_nij, 'head_accel_max': np.max(np.abs(std_head_accel)), 'neck_force_max': np.max(std_neck_force), }, 'oop': { 'HIC15': oop_hic, 'Nij': oop_nij, 'head_accel_max': np.max(np.abs(oop_head_accel)), 'neck_force_max': np.max(oop_neck_force), } }
if __name__ == "__main__": analysis = OOPCrashAnalysis() results = analysis.compare_standard_vs_oop() print("=== OOP vs 标准坐姿碰撞伤害对比 ===") print(f"{'指标':<20} {'标准坐姿':<15} {'OOP 前倾':<15} {'阈值':<10} {'OOP 超标?'}") for metric in ['HIC15', 'Nij']: std = results['standard'][metric] oop = results['oop'][metric] threshold = analysis.THRESHOLDS.get( f'head_injury_{metric.lower()}' if metric == 'HIC15' else f'neck_injury_{metric.lower()}' ) exceed = '❌ 超标' if oop > threshold else '✅ 合格' print(f"{metric:<20} {std:<15.1f} {oop:<15.1f} {threshold:<10} {exceed}") print(f"\nOOP 伤害增幅:") print(f" HIC15: +{(results['oop']['HIC15']/results['standard']['HIC15']-1)*100:.0f}%") print(f" Nij: +{(results['oop']['Nij']/results['standard']['Nij']-1)*100:.0f}%") print(f" 头部加速度: +{(results['oop']['head_accel_max']/results['standard']['head_accel_max']-1)*100:.0f}%") print(f" 颈部力: +{(results['oop']['neck_force_max']/results['standard']['neck_force_max']-1)*100:.0f}%") print(f"\n=== 传感器配置 ===") print(f"加速度计: {analysis.config.n_accelerometers} 通道") print(f"力传感器: {analysis.config.n_force_sensors} 通道") print(f"高速摄像: {analysis.config.n_high_speed_cameras} 台") print(f"采样率: {analysis.config.sample_rate} Hz")
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