某型防爆胶轮车后车架的拓扑优化及轻量化设计

Light-weight Design and Topological Optimization for Rear Frame of One Explosion-proof Rubber-tyred Vehicle

以国内某设计院设计研发的某型防爆胶轮车为研究对象,在满足静动态要求前提下,探究其后车架结构最优、质量最轻。基于变密度法和优化设计理论,利用有限元分析软件Hypermesh对该型防爆胶轮车后车架进行了拓扑优化,利用优化后的模型进行了该后车架的二次设计,得出了该后车架的最优结构。再对新设计的后车架进行尺寸优化,得出该车架各部件最佳的厚度,使轻量化达到最佳程度。对比优化前后该车架的静动态分析结果,得出优化后的后车架比优化前在重量上有所减轻,在结构上更加合理,静动态性能基本上保持不变。

The study assessed one explosion-proof rubher-tyred vehicle that a designing institute has designed and researched, on the premise that Dynamic and static characteristic demands, rear frame is exploring structural optimal and minimum mass.according to variable density method and theory of optimized design, finite element analysis software Hypermesh was taken topological optimizationfor rear flame,then second design was carried through using optimized model and got its optimum structure then size optimization was executed for new rear frame, it concluded optimum thickness for parts of rear frame, so lightweight reaehs optimum. By comparing to static and dynamic analysis results for before and after optimization, it was confirmed that optimal was lighter and more rational on the structural than before optimization of rear frame,static and dynamic characteristic keeps invariable.