汽车-行人碰撞多体动力学仿真与抛距模型研究

汽车与行人碰撞是我国道路交通事故的主要类型之一,该类事故在所有事故中致死率最高且与人们的安全出行密切相关,受到民众的广泛关注.然而传统的事故分析方法在此类事故的处理上存在较大困难.文章以多体动力学理论为基础,以PC-CRASH为平台,建立了多刚体数字化行人模型,通过设定代表身体各部分的属性(外形、质量、刚度、摩擦系数等)来定义行人特征.并将模型与国外某实车碰撞试验对比验证其可靠性.通过对仿真结果的回归分析得出了车速-抛距模型,为该类交通事故处理提供了数据参考.

Simulation of Car-Pedestrian Collision Multi-body Dynamics and Study of Throwing Distance Model

Vehicle-pedestrian collision is a major type traffic accident in China. Because of its high fatality rate and closely related with people＇s travelling, people pay close attention to this type of accident. However, it is difficult to handle such kind of accident with common use ＂accident analyzing method＂. Based on multi-body dynamic theory, the paper built a numerical multi-rigid-body pedestrian model as a platform for PC-CRASH to simulate the collision between vehicle and pedestrian. Through setting rigid-body characters of different parts of the pedestrian （appearance , mass, rigid, friction factor） , the characters of pedestrian can be defined. The model was validated by comparing with a real car collision experiment abroad. The speed throwing distance was obtained through the regression analysis of simulation results. It provides numerical reference for such vehicle-pedestrian traffic accident. V Ch ,5 fig. 3 tab. 13 ref. ]