基于响应面的空心活塞杆轻量化设计

Lightweight design of hollow piston rod based on response surface

以新能源汽车减振器活塞杆为研究对象,对其进行了静动态特性分析,在保证活塞杆综合力学性能的前提下,进行了轻量化设计研究。以活塞杆空心区域直径等6个结构参数为设计变量,进行了中心复合实验设计,对各设计变量进行了灵敏度分析,并根据得到的数据结果建立了空心活塞杆的响应面模型。利用多目标遗传算法完成了空心活塞杆的优化设计,与原结构方案相比整体减重60%,实现了空心活塞杆轻量化设计。该优化分析方法可以在保证活塞杆动静态特性要求的同时缩短研发设计所需的时间,同时避免了选取设计变量盲目性。对汽车零部件的轻量化优化设计研究具有重要意义。

In this paper,the piston rod of new energy vehicle shock absorber is taken as the research object,and the static and dynamic characteristics of its working characteristics are analyzed.Under the premise of ensuring the comprehensive mechanical properties of the piston rod,the lightweight design research is carried out.Six structural parameters such as the diameter of the hollow region of the piston rod were used as design variables to carry out central composite experiment design.The sensitivity analysis of each design variable was carried out,and the response surface model of the hollow piston rod was established according to the obtained data.Multi-objective genetic algorithm was used to complete the optimization design of the hollow piston rod.Compared with the original structure scheme,the overall weight of the hollow piston rod was reduced by 60%,and the lightweight design of the hollow piston rod was realized.This optimization analysis method can shorten the time of R&D and design while ensuring the dynamic and static characteristics of piston rod,and avoid the blindness of selecting design variables.It is of great significance to the research of lightweight optimization design of automobile parts.