【摘要】 以某型地铁车辆转向架构架为研究对象,根据结构模态综合法基本原理,通过有限元模态分析对构架进行主自由度缩减,得到构架模态中性文件。建立地铁车辆刚柔耦合多体动力学模型,利用多体动力学仿真,得到不同工况下构架关键部位的应力时间历程变化趋势。最后采用惯性释放法对构架关键部位进行准静态应力分析,依据车辆刚柔耦合多体动力学模型得到转向架构架关键部位的边界载荷,结合材料的S-N曲线,最后通过虚拟疲劳仿真的方法预测构架关键部位的疲劳寿命。更多还原

【Abstract】 Taking a certain type of metro vehicle bogie frame as the research object,according to the basic principle of modal synthesis method,the frame modal neutral file hasbeen get through the modal analysis of the frame by free degree reduction.The rigid flexible coupling multibody dynamics model is set up by using the neutral file,which can get access to the stress time history of key part of theframe under different conditions through simulation. Finally,quasi static stress analysis of the key part of the frame hasbeen conductedby inertia relief method of finite element analysis.The boundary loads ofthe key parts of bogie frame can be calculated based on the coupled multi-body dynamics model of vehicle.Combined with the material SN curve,fatigue life of the key parts of the frame have been predicted by the method of virtual fatigue simulation.更多还原