某地铁铝合金车体底架断面拓扑优化设计

Topological optimization design of the underframe section of a certain subway aluminum alloy car body

对某地铁铝合金车体进行了几种重要工况下的有限元分析,结果表明,该车体的静强度和刚度均符合规定的要求,而且具有一定的减重空间;随后对该车体底架铝合金型材断面进行了拓扑优化,根据拓扑优化的结果和工程实际重新设计底架的筋板,并通过有限元分析对其静强度和刚度进行验证,结果表明结构优化后的车体符合规定的静强度和刚度要求。优化后底架减重268 kg,减重率为8.8%,减重效果较为可观,本次拓扑优化分析结果可为今后铝合金地铁车体底架的筋板设计和轻量化研究提供一定的参考依据和思路。

In this paper,the finite element analysis of a subway aluminum alloy car body under several important working conditions is carried out.The results show that the static strength and stiffness of the car body meet the specified requirements,and there is potential for weight reduction.Subsequently,topological optimization is carried out for the aluminum alloy section of the underframe of the car body,and the fascia of the underframe is re-designed according to the results of the topological optimization and the actual engineering practice.The static strength and stiffness of the optimized underframe are verified through the finite element analysis.The results show that the optimized car body meets the requirements for static strength and stiffness.After optimization,the weight of the underframe is reduced by 268 kg(8.8%),which is a considerable weight reduction.This study can provide reference for future lightweight design of the fascia plate of the underframe of the aluminum alloy car body.