永磁直驱柔性构架转向架的动力学模型研究

Study on Dynamic Model for Flexible Frame Bogie with PMSM

永磁直驱柔性构架转向架是一种新型的地铁车辆转向架,具有结构简单、紧凑、曲线通过能力强等特点。使用Simpack软件建立了永磁直驱柔性构架转向架两种不同的动力学模型:构架集总参数的多刚体动力学模型和构架的刚柔体动力学模型。在构架集总参数模型中,将柔性构架视为两个通过多向弹簧连接的侧梁。在构架离散参数模型中,将柔性构架作为柔性体处理。仿真分析了装用永磁直驱柔性构架转向架的地铁车辆的蛇形运行临界速度、曲线通过安全性和运行平稳性。仿真结果表明:构架集总参数模型适用于优化柔性构架的刚度参数,进行脱轨安全性分析和车辆稳定性分析,而构架离散参数模型更适用于平稳性分析。

This paper introduces a new flexible frame bogie with PMSM,which is characterized by the simple structure and good curve passing performance.Two dynamic models of flexible frame bogie with PMSM are built by Simpack software.In the first model,the flexible frame is treated as two rigid side beams which are linked by a multi-direction spring.In the second,the whole flexible frame is treated as a flexible body.The simulation results show that the rigid model is suitable for analyzing hunting stability and derail safety,as well as optimizing stiffness parameters of flexible frame,while the rigid-flexible model is suitable for calculating ride quality accurately.