基于子结构和模式重复的地铁车辆座椅支架拓扑优化

Topology optimization of metro vehicle seat support based on substructure and mode repetition

针对地铁车辆座椅模型加载范围广和座椅支架结构对称的特点,在进行地铁车辆座椅支架拓扑优化时,采用SIMP理论建立数学模型,同时引进子结构和模式重复方法,优化得到符合设计要求的结构。对比结果认为:优化后的地铁车辆座椅支架质量减轻49%,地铁车辆整体的强度性能增强,可达到地铁车辆座椅支架轻量化的目标。

In view of the wide loading range of the metro vehicle seat model and the seat support structure symmetry features,the topology optimization of the metro vehicle seat support is carried out. The mathematical model of topology optimization is built by SIMP theory. The substructure method and the mode repetition are presented to optimize the structure,which meets the requirements of the design. The comparison results show that the mass of the optimized metro vehicle seat support is reduced by 49%,and the whole strength of the metro vehicle is enhanced,which can meet the lightweight target of the metro vehicle seat bracket.