纯电动汽车翻滚耐撞性拓扑优化设计  

Design of Crashworthiness Topology Optimization for Battery Electric Vehicle Body Based on Rolling Collision

作　　者：宋洁 雷正保[1] 

机构地区：[1]长沙理工大学

出　　处：《汽车工程师》2017年第11期25-28,共4页Automotive Engineer

基　　金：国家自然科学基金(51175050)

摘　　要：为了提高汽车的翻滚碰撞安全性,以某品牌纯电动车为原型,车身结构刚度最大化为目标,建立白车身耐撞性拓扑优化数学模型,利用法规FMVSS 208中的翻滚方法对纯电动汽车车身进行拓扑优化,根据材料分布得到一种车身骨架构型,对构型进行验证分析,结果表明:在顶压试验中,当加载力达到汽车自身质量的1.5倍时压力板位移为39.4 mm,远小于法规要求的127 mm;在动态翻滚碰撞过程中,A柱和B柱最大变形量分别为52 mm和55 mm,能够满足乘员生存空间要求,因而验证了该研究方法的可行性。In order to improve the safety of the vehicle rolling collision, taking a battery electric vehicle as the prototype and the maximization of body structure stiffness as the goal, a mathematical model of body in -white crashworthiness topology optimization is established. In the use of the method stipulated in FMVSS 208 regulations a topology optimization is made for battery electric vehicle, and according to the distribution of material a body frame configuration is gotten. Finally a verification of this configuration showed that when the loading force is 1.5 times as weight as the vehicle in the compression test of vehicle roof, the displacement of pressure plate is 39.4 mm, far less than 127 mm that required by regulations; in the process of dynamic rolling collision the maximum deformation of Skeleton of A pillar and B pillar are 52 mm and 55 mm respectively, which are able to meet the requirements of occupant＇s living space, and therefore the feasibility of this method is verified.

关 键 词：汽车翻滚 纯电动汽车 拓扑优化 顶压试验 

分 类 号：U469.72[机械工程—车辆工程]