纯电动城市客车侧围骨架结构轻量化设计

Lightweight Design of Side Frame Structure of Pure Electric City Bus

摘要: 针对纯电动城市客车侧围骨架结构沿用传统燃油城市客车侧围骨架结构设计导致载荷传递不合理、构件冗余的问题，对纯电动城市客车侧围骨架结构重新进行轻量化设计。以某款纯电动城市客车侧围骨架为研究对象，基于Hypermesh软件建立有限元模型，在紧急转弯工况下，采用拓扑优化的方法对客车侧围骨架结构进行轻量化设计，并对设计结果进行静力学分析和模态分析。结果表明，与原结构相比，侧围骨架质量降低9.74％，实现了纯电动城市客车侧围骨架结构轻量化设计，同时避免了共振现象的产生。

Abstract: For pure electric city bus side scarf skeleton structure side of traditional fuel city bus frame struc-ture design leads to unreasonable load transfer, the problem of redundant components, the pure electric city bus side around the skeleton structure lightweight design again. Taking the side frame of a pure electric city bus as the research object, the finite element model is established based on Hypermesh software. Under the emergency turning condition, the light weight design of the side frame structure of the bus is carried out by topological optimization method, and the design results are analyzed statically and modal. The results show that, compared with the original structure, the side frame mass is reduced by 9.74%, and the lightweight design of the side frame structure of pure electric city bus is realized, and the resonance phenomenon is avoided.