纯电动物流车电机悬置支架结构优化设计

Optimization Design of Motor Mounting Bracket Structure for Pure Electric Logistics Vehicle

基于纯电动车对轻量化设计要求的提高,提出了基于CAE的结构优化设计来实现电机悬置支架的轻量化设计目标。首先建立了原支架结构的有限元分析模型,分析得到了原结构在4种工况下的应力及变形分布;在此基础上建立了拓扑优化设计模型,分别对前支架、后左支架及后右支架进行了结构优化设计,与原结构的强度进行了对比分析,结果表明优化后的电机悬置支架在保证强度及刚度满足要求的前提下,减重14.2%。

Based on the improvement of lightweight design requirements for pure electric vehicles,a CAE-based structural optimization design was proposed to achieve the lightweight design goal of the motor mounting bracket.Firstly,the finite element analysis model of the original support structure was established.The stress and deformation distribution under four working conditions were analyzed.Based on this,a topology optimization design model was established,and the structure of the front bracket,the rear left bracket and the rear right bracket was optimized.Comparing with the strength of original structure,the weight of the optimized brackets of the motor are reduced by 14.2%under the premise of ensuring the strength and stiffness meet the requirements.