Simulation and analysis of wheel wear prediction with rigid flexible couple wheelset

Abstract

Wheel wear problem of high-speed train is one of the important factors that affect the dynamic performance of the train, from the angle of wear prediction, combined with the Hertz vehicle dynamics model, rolling contact model, wheel wear model, analyzed the main influencing factors of wheel wear. The rigid flexible coupling dynamic model is established to calculate the wheel rail contact relationship considering the wheel elastic deformation, and the Fastsim algorithm is used to calculate the creep force and contact parameters on the wheel rail contact spot. Combining the Fastsim algorithm and the Zobory wear model, the wear rate of the contact surface between the rigid wheel and the elastic wheel is obtained. The results show that in a straight section considering wheel elastic model to increase the width of the rigid model of wear, wear depth of the amplitude is also increasing. The maximum wear depth of rigid model is 9.23e-4mm, the maximum wear depth of the rigid flexible couple model is 1.019e-3mm, and the maximum depth of rigid flexible couple model increased 9.4%. The effects of the velocity and the longitudinal stiffnesss of the two models are analyzed. When the velocity and the longitudinal stiffness of the system are increased, the wear depth of the flexible wheelset model is more obvious than that of the rigid wheelset model.