硬路面碎块抛物运动模型

基金项目: 教育部高等学校骨干教师资助项目

Motion modeling of throwing object on rigid roadway

摘要: 事故现场固体抛落物及其分布场隐含着揭示交通事故状态的重要信息。基于抛物运动的各种运动成分描述, 分析了道路交通事故汽车碰撞速度与抛物距离之间的各种关系模型, 揭示了包括经典抛物方程、弹跳运动和滚动—滑动运动模型的广义抛物运动规律。以汽车大灯玻璃碎片为例, 给出了校验广义抛物运动方程的参数。
- 交通碰撞事故 /
- 抛物 /
- 运动规律 /
- 广义模型 /
- 大灯玻璃碎片
Abstract: Solid throwing objects and their spreading field on traffic accident scene hint important details about the status of traffic accident.This paper analyzes the models involved in the correlation between crash velocity and throwing distance based on motion law of throwing objects (i.e.glass splinter).The generalized throwing motion law that is composed of parabolic motion, spring motion and rolling sliding motion is revealed. The generalized throwing motion formula is derived and the model parameters are calibrated based on the throwing motion of headlamp glass splinter.
- crash /
- throwing object /
- motion law /
- generalized motion model /
- headlamp glass splinter

图 1 理论抛物运动轨迹

Figure 1. Theoretical track of throwing object motion

下载: 全尺寸图片幻灯片

图 2 抛出高度与抛出距离的关系

Figure 2. Correlation between throwing height and throwing distance

下载: 全尺寸图片幻灯片

表 1 用试验回归分析得到的大灯碎片抛距方程系数

Table 1. Regression coefficients of throwing distance equation of headlamp glass-splinter based on test results

碎片最近抛距碎片中心抛距碎片最远抛距

k₁ k₂ k₁ k₂ k₁ k₂

2.5508 -0.6957 1.7155 -0.1781 1.0038 0.3556

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