车人碰撞事故中车头参数敏感性分析  

Parameter sensitivity analysis of vehicle head shape for vehiclepedestrian accidents

作　　者：李华[1,2] 李岳林 邹铁方[1,2] 刘勇 肖璟[1,2] LI Hua;LI Yuelin;ZOU Tiefang;LIU Yong;XIAO Jing(School of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410004,China;Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha 410004,China)

机构地区：[1]长沙理工大学汽车与机械工程学院 [2]湖南省工程车辆安全性设计与可靠性技术重点实验室

出　　处：《汽车安全与节能学报》2017年第4期367-373,共7页Journal of Automotive Safety and Energy

基　　金：国家自然科学基金资助项目(51775056);湖南省自然科学基金资助项目(2016JJ2003)

摘　　要：为更好地了解车人碰撞事故中车头参数对碰撞后人体动力学响应的影响,实测获得411辆车的车头数据,利用PC-Crash软件仿真试验,获得行人抛距及行人损伤等响应;采用参数敏感性分析方法对车头参数敏感性进行分析。结果表明:8个车头参数对行人动力学响应的敏感性顺序,最高的为前挡风玻璃底端距地面高度,其次为引擎盖长度,最低的为车头前面板长度及保险杠底端距地面高度;给出车头长度、高度和车速对行人动力学响应的敏感性顺序依次为车速、车头长度、车头高度;车头参数与行人动力学响应组合分析显示各个参数对细化后的人体动力学响应的影响程度,前挡风玻璃底端距地面高度最为敏感。该研究对于更好地开展事故再现、痕迹采集及车头设计等均具有实用价值。The simulation tests were conducted with the Pc-Crash software based on the measured data of411vehicles’head shape to obtain more information about the influence of the vehicle head shape on the dynamic response of the pedestrian in vehicle-pedestrian accidents.All parameters about the dynamic response of the pedestrian were measured.A exist parameter sensitivity analysis method was adopted to analyze the sensitive of the vehicle head shape.The results show that in the orders of8sensitivity parameters used to describe the pedestrian dynamic response,the first is the height between the front windshield bottom and the ground,the second is the length of hood,the last is the height between the bumper bottom and the ground.Combining the velocity analysis,the orders of the sensitivity parameters is velocity,the length of car head,the height of car head.It is clarified that the most sensitivity parameters is the height between the front windshield bottom and the ground among the8parameters which have the influences on difference dynamic response.The research is practical meaningful in the fields of accident area,the trace measurement and the design of the vehicle shape.

关 键 词：车人碰撞事故 车头参数 仿真 敏感性分析 响应 

分 类 号：U461.91[机械工程—车辆工程]