某混合动力客车骨架的轻量化设计  

Lightweight design of a hybrid electric bus frame

作　　者：吴胜军[1] 袁威 梁治千 孟航宇 WU Shengjun;YUAN Wei;LIANG Zhiqian;MENG Hangyu(Hubei Institute of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院,十堰442002

出　　处：《现代制造工程》2022年第3期48-53,76,共7页Modern Manufacturing Engineering

基　　金：湖北省自然科学基金项目(2014CFB630);汽车零部件技术湖北省协同创新项目(2015XTXZX0421);汽车动力传动与电子控制湖北省重点实验室开放基金项目(ZDK1202004)。

摘　　要：首先对某混合动力客车骨架进行了静力、模态和正面碰撞分析,将分析结果结合响应线性主效应图筛选出对碰撞时驾驶员处加速度、整车吸能、极限扭转工况的应力和一阶模态频率影响较大的构件,以筛选出构件的厚度作为设计变量,分别采用2种方案进行多学科优化,优化方案一是以整车质量最小为目标的单目标优化,优化方案二是以整车质量最小、整车吸能最大为目标的多目标优化。分析结果表明,优化方案二优化效果更好,整车质量减小了20.94%,整车吸能增加了19.54%,碰撞时驾驶员处加速度降低了29.09%,实现轻量化的同时还有效提高了碰撞安全性。Firstly,the static,modal and frontal impact analysis of the hybrid electric bus frame were carried out.Based on the analysis results and the response linear main effect diagram,the components which have great influence on the impact acceleration,energy absorption,stress and modal were selected.The thickness of the components was selected as the design variable,and the two optimization schemes were used to optimize,the first scheme was the single objective optimization with the minimum mass as the objective,and the second scheme was the multi-objective optimization with the minimum mass and maximum energy absorption as the objective.The optimization analysis results show that the optimization effect of scheme 2 is better,the mass is reduced by 20.94%,the energy absorption is increased by 19.54%,and the acceleration is reduced by 29.09%,which not only completes the lightweight,but also effectively improves the bus frame collision safety.

关 键 词：多学科优化 轻量化 碰撞 

分 类 号：U462.2[机械工程—车辆工程]