基于碰撞性能的某全铝电动汽车结构优化设计

Optimization Design of an All-aluminum Electric Vehicle Based on Collision Performance

文章建立了整车有限元模型,按照国标要求模拟了正面100%重叠碰撞,并开展了实车碰撞试验;从B柱加速度-时间历程曲线、前端吸能结构的变形模式和乘员舱侵入量等方面,详细对比了仿真与试验结果,验证了整车仿真分析模型具有较高的可靠性和准确度,精度可达到98%以上。最后,利用验证后的有限元模型对车身的前端结构进行了多目标优化分析,将整车碰撞加速度由初始值53g降低为48g。

In this paper,the finite element model of the vehicle is established.The positive 100%overlap and collision is simulated according to the international standard,and the real car crash test is carried out.From the B column acceleration time history curve,the front energy absorbing structure deformation mode and passenger compartment intrusion etc.,the vehicle simulation analysis model is verified to be highly reliable and accurate,and the accuracy can reach over 98%.Finally,using the validated finite element model,the multi-objective optimization analysis of the front end of the vehicle body is carried out.The acceleration of the vehicle is reduced from 53 g to 48 g.