基于轿车-行人事故重建的行人颅脑损伤研究

通过深入的轿车-行人事故调查研究建立了行人事故数据库,挑选了其中12例轿车-行人碰撞事故,运用轿车-行人碰撞多体模型进行了事故重建.根据其结果,采用回归分析方法建立了运动学参数与行人颅脑损伤的相关回归模型,求得各参数之间的相关性.研究结果表明,轿车-行人碰撞速度与头部碰撞时间、头部碰撞相对速度、行人抛出距离以及头部损伤HIC值之间有着显著的相关性;速度限制和改进汽车前部结构可在一定程度上降低行人头部损伤风险.

A Study on Pedestrian Head-Brain Injury Based on Reconstructions of Car-Pedestrian Accidents

Through the in-depth survey on car-pedestrian accident,a pedestrian accident database is built,from which 12 cases of car-pedestrain accident are chosen to conduct accident construction by using multibody model for car-pedestrian crash.Based on these results,the regression model for the relation between kinematic parameters and head-brain injuries of pedestrian is established,and the correlativity between parameters is evaluated.The results show that there are significant correlativities between car-pedestrian impact speed and such parameters including head impact time,head impact relative velocity,thrown out distance and head injury criterion HIC of pedestrian,and that to limit driving speed and improving car front structures can reduce the risk of pedestrian head injuries to certain extent.