B型铝合金地铁车体模态分析及试验验证

摘要

According to the structural characteristics of B-type aluminum subway cars and mechanical properties of aluminum alloys, set up finite element model reasonably to simulate the modal of carbody structure. By comparing,it is found that the finite element analysis results and experimental datas have familiar inherent frequencies and modal shapes of the first 6 order modes. Taking into account the complexity of the carbody and the process of setting up the finite element model of the carbody structure, the finite element can be identified reliability, then providing a reference for further optimization and improving.%针对B型铝合金地铁车的的结构特点及铝合金材料的力学特性，合理建立车体有限元模型，模拟车体结构的模态。通过试验与计算结果的对比表明，有限元分析结果与试验数据在模态的振型和频率在数值上接近一致，考虑到车体结构的复杂性及有限元建模的过程，可以认定有限元模拟的可靠性，为车体结构的进一步优化与改进提供了参考依据。