基于交叉熵方法的汽车侧面结构耐撞性优化设计  

Optimal Design of Automobile Side Structure Crashworthiness Based on Cross-entropy Method

作　　者：赵建文 席向军 ZHAO Jianwen;XI Xiangjun(Chengdu Shengming Automobile Technology Co.,Ltd.,Chengdu 611730,China)

机构地区：[1]成都盛名汽车科有限公司,成都611730

出　　处：《机械工程师》2024年第10期141-146,共6页Mechanical Engineer

摘　　要：为提升某型电动汽车侧面碰撞结构的耐撞性,提出基于交叉熵的侧面结构优化设计方法。首先,构建整车侧面碰撞结构有限元模型,并依据仿真及试验数据对比,验证了有限元模型的有效性;其次,依据仿真分析结果,取侧面结构板厚作为设计变量并赋予约束条件,将车门侧面撞击侵入速度最小化作为目标函数,构建侧面结构耐撞性优化模型,并采用交叉熵优化算法对其进行求解;最后,对某型车侧面结构耐撞性开展优化设计,并对优化结果有效性进行验证。优化结果表明:车辆侧面撞击侵入速度最大优化率为32%,提升了车辆侧面结构的耐撞性能,该结论对于整车结构优化提升具有参考价值。In order to improve the crashworthiness of the side impact structure of an electric vehicle,an optimization design method of side structure based on cross-entropy is proposed.Firstly,the finite element model of the vehicle side impact structure is built,and the validity of the finite element model is verified by comparing the simulation and test data.Secondly,according to the simulation analysis results,the thickness of the side structure is taken as the design variable,and the constraint conditions are given,the goal function is to minimize the side impact intrusion velocity of the door.The crashworthiness optimization model of the side structure is constructed,and the cross entropy optimization algorithm is used to solve it.Finally,the crashworthiness of the side structure of a vehicle is optimized,and the effectiveness of the optimization results is verified.The optimization results show that the maximum optimization rate of vehicle side impact intrusion speed is 32%,which improves the crashworthiness of vehicle side structure.This conclusion can provide reference for the optimization and improvement of vehicle structure.

关 键 词：交叉熵优化 结构耐撞性 侧面碰撞 优化设计 

分 类 号：TH112.1[机械工程—机械设计及理论] U264.34[机械工程—车辆工程]