基于模态实验的轨道牵引电机整机有限元模型的建立

Finite element modeling of rail traction motor based on modal experiments

基于电机在工业各个领域中的广泛应用,建立准确的电机整机有限元模型,对于考核电机的结构设计、避免电机运行状态发生振动问题有着指导作用。针对某型轨道牵引电机,开展从零部件级到电机整机的模态实验。在此基础上,开展电机相应零部件的等效有限元模型建立,重点解决等效参数的确定、部件连接的合理接触建模以及转定子铁芯横观各向同性材料参数测量等关键问题。通过设定合理的轴承参数,将转子部件与定子部件组合,建立该牵引电机整机的等效有限元模型,并通过整机的模态实验验证该模型的正确性。

The motor has been widely used in various industrial fields.And,the establishment of an accurate finite element model of the motor machine has a guiding role in assessing the structural design of the motor for avoiding vibration in the running state of the motor.For this reason,this paper carried out modal test from component to the whole motor on a certain type of rail traction motor.On this basis,the equivalent finite element model of the corresponding parts of the motor was developed,and the key problems,which include the determination of equivalent parameters,the reasonable contact modeling of parts connection and the measurement of the transversely isotropic material parameters of the rotor iron core,were solved.Finally,the equivalent finite element model of the traction motor was established by setting reasonable bearing parameters with combining the rotor and stator components.