通过对以往相关领域学者的研究进行讨论，发现各种转子系统弯扭耦合振动的相

Through the discussion of previous researches by scholars in related fields, it is found that there are many related researches on the bending and torsional coupling vibration of various rotor systems, but there are few researches on the bending and torsion vibration of the rotor which takes into account the action of the radial electromagnetic force. There are fewer studies on the radial vibration of the rotor of traction motors. Therefore, this research uses the finite element algorithm to construct a finite element model of the rotor, and uses the rotor model to simulate the rotor of the traction motor according to the radial vibration of the rotor, and finally analyzes the effect of the radial vibration of the rotor under the influence of various factors, with a view to the future of the train. Run to provide experimental reference.

Through the discussion of previous studies of scholars in related fields, it is found that there are more studies on the bending coupling vibration of various rotor systems, but fewer studies are on rotor bending vibration for motors and consider the action of radial electromagnetic forces, and less research is on the radial vibration law of rotor radial vibrations for traction motors used in locomotive sets. Therefore, by using finite elements algorithm to construct the rotor finite elements model, and for the radial vibration of the rotor, the rotor model is used to simulate the traction motor rotor, and finally analyzes the effect of radial vibration on the rotor under the influence of various factors, in order to provide experimental reference for the operation of the later trains.

Through the discussion on the previous research of scholars in related fields, it is found that there are many researches on the flexural torsional coupling vibration of various rotor systems, but there are few researches on the flexural torsional vibration of the rotor considering the radial electromagnetic force of the motor, and less researches on the radial vibration of the rotor of traction motor for EMU. Therefore, this study constructs the rotor finite element model by using the finite element algorithm, and uses the rotor model to simulate the traction motor rotor for the radial vibration of the rotor, and finally analyzes the effect of various factors on the rotor radial vibration, so as to provide practical reference for the later train operation.<br>