纯电动汽车白车身耐撞性拓扑优化设计方法-《郑州大学学报(工学版)》

文章信息/Info

Title:: Crashworthiness Topology Optimization Method of Pure Electric Car BIW

Author(s):: Lei Zhengbao; Liu Zhuchun; Liao Zhuo; School of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha, Hunan, 410004

Keywords:: pure electric vehicles; crashworthiness; topology optimization; BIW

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,然后在秉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.

Abstract:: Since there are as many as nine vehicle collision conditions and the collision forces of different conditions vary greatly, the final overall topology configuration will be more inclined to the conditions with large collision forces when performing multi-condition parallel topology optimization on the car body, and the front, Due to the different collision forces in the passenger area and the rear of the vehicle, the optimal optimal mass ratio is also different, so the multi-condition crashworthiness topology optimization of the entire body cannot be carried out at the same time. In order to obtain a vehicle configuration with a reasonable and effective material distribution, the same The model conducts a comparative analysis of the overall topology optimization and sub-area topology optimization, and proposes a topology optimization of the seating area first, and then optimizes the topology of the front and rear of the vehicle when the structure of the seating area is known, and finally assembles the topology of the entire vehicle. Topology optimization design method for crashworthiness of body-in-white based on optimization model.