纯电动汽车白车身耐撞性拓扑优化设计方法  

Crashworthiness Topology Optimization Method of Pure Electric Car BIW

作　　者：雷正保[1] 刘助春 廖卓[1] LEI Zhengbao LIU Zhuchun LIAO Zhuo(Institute of Vehicle Engineering, Changsha University of Science and Technology, Changsha 410004, China)

机构地区：[1]长沙理工大学汽车与机械工程学院,湖南长沙410004

出　　处：《郑州大学学报（工学版）》2016年第5期77-81,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(51175050)

摘　　要：由于车辆碰撞工况多达9种且不同工况的碰撞力相差很大,对车身进行多工况并行拓扑优化时最终的整体拓扑构型会更加趋向于碰撞力大的工况,且车头、乘坐区、车尾由于碰撞力不同,最佳优化质量比也不同,故不能同时对整个车身进行多工况耐撞性拓扑优化.为得到一个材料分布合理有效的整车构型,通过对同一模型进行整体拓扑优化与分区域拓扑优化的对比分析,提出一种先进行乘坐区拓扑优化,然后在乘坐区结构已知的情况下,对车头、车尾拓扑优化,最后拼装成整车拓扑优化模型的白车身耐撞性拓扑优化设计方法.As the vehicle collision condition up to 9 kinds and the impact force of different conditions vary greatly,the final overall topology configuration will tend to working conditions with bigger collision force when multiple parallel topology optimization are used in whole body. What＇s more,the best optimization mass ratio of front,car and rear is different for their different collision force. Thus multiple crashworthiness topology optimization can not be used in the whole body simultaneously. In order to obtain a vehicle configuration with reasonable and effective material distribution,we put forward a crashworthiness topology optimization method of pure electric ear BIW by the comparative analysis of the overall topology optimization and subregion topology optimization of one model. The method is doing the car topology optimization at first and doing the head and rear topology optimization after we get car topologies,in this way we obtain the vehicle topology optimization results finally.

关 键 词：纯电动汽车 耐撞性 拓扑优化 白车身 

分 类 号：U270.2[机械工程—车辆工程]