【摘要】 在地铁车体结构的优化设计区域筛选中，常使用灵敏度方法，操作流程复杂烦琐且不能快速应用到车体结构的设计中；而基于刚度贡献度理论，在通过试验验证有限元模型精度后，将地铁铝合金车体的局部刚度与整体刚度相结合，可快速确定车体的主要优化区域；采用拓扑优化与尺寸优化相结合的方法，对车体结构进行二次优化设计研究。优化后的车体结构性能完全符合EN 12663标准，优化后车体质量减少了5.34%,1阶垂弯频率提升16%，其他模态频率也显著提高。此研究成果为其他地铁车体结构的优化设计提供了技术参考。更多还原

【Abstract】 In the screening of optimization design regions for subway car body structures, the sensitivity method is often used; however, its operation process is complex and cumbersome, and it cannot be quickly applied to the design of car body structures. To address this issue, based on the stiffness contribution theory and on the premise that the accuracy of the finite element model was verified through experiments, the local stiffness and global stiffness of the aluminum alloy subway car body were combined to quickly determine the main optimization regions of the car body. A method integrating topology optimization and size optimization was adopted to conduct a secondary optimization design study on the car body structure. The structural performance of the optimized car body fully complied with the EN 12663 standard: the mass of the optimized car body was reduced by 5. 34%, the 1 st-order vertical bending frequency was increased by 16%, and other modal frequencies were also significantly improved. This optimization provides a technical reference for the optimization design of other subway car body structures.更多还原