行人腿部保护汽车前部结构优化  

An Optimization of Vehicle Frontal Structure for Pedestrian Leg Protection

作　　者：乌秀春[1,2] 周盼[1] 郑文强[1] 鲁宏升 

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海电机学院汽车学院,上海200245 [3]上海恒士达科技有限公司,上海201203

出　　处：《机械设计与制造》2015年第7期87-90,共4页Machinery Design & Manufacture

基　　金：上海电机学院学科基础建设项目(12XKJC02);上海市科技型中小企业技术创新基金项目(1301H138200)

摘　　要：为减少人车碰撞事故中对行人的伤害,采用LS-DYNA软件模拟人车碰撞过程,分别模拟了刚性腿型和柔性腿型的碰撞情况,得到行人小腿的伤害规律。同时,针对柔性腿型的分析结果,对汽车前部结构从三个方面进行优化:改进泡沫刚度,行人腿部总得分值提高了10.01%;改变小腿支撑,行人腿部总得分值提高了10.37%;改进保险杠横梁,行人腿部总得分值提高了17.63%。通过改进汽车的前部结构,柔性小腿的碰撞性能得到了优化,为行人保护方面的汽车前部结构设计提供了参考。In order to reduce the pedestrian injuries in the vehicle-pedestrian collision accidents. The finite element analysis software LS-DYNA is applied to simulate the process of the vehicle-pedestrian collisions,respectively simulated crash conditions of rigid legs and flexible legs,according to the result of the collision analysis,obtained the law of the pedestrian leg injury. Meanwhile,according to the analysis of flexible legs,the front structure of the car has been improved from three aspects. By improving the foam stiffness,the total score of the pedestrian leg improved 10.01%;changing calf support structure,the total score of the pedestrian leg increased by 10.37%; improving bumper beam,the total score of the pedestrian leg increased by 17.63%. By modifying the front structure of the car,crash performance of the flexible leg had been optimized,and could provide the reference for automobile front structure design in the pedestrian protection aspect.

关 键 词：行人腿部保护 碰撞模拟 结构优化 LS-DYNA 

分 类 号：TH16[机械工程—机械制造及自动化] U463[机械工程—车辆工程]