Analysis of High-Speed Railway Vehicle Trucks with Worn and Eccentric Wheelset Moving on Curved Tracks

This paper develops a 9 degree-of-freedom (DOF) mathematical model to analyze the dynamic behavior of high-speed railway vehicle truck running on curved tracks with worn and eccentric wheelset. The Kalker's linear creep theory is applied to investigate the contact forces between the wheels and rail. The hunting (critical) speeds, the effects of primary suspension stiffness, the flange contact force and the angle of attack with worn wheelset are investigated. Moreover, the dynamic response with eccentric wheelset is also analyzed. The results demonstrate that the hunting speeds decrease significantly for the worn wheelset system. The primary suspension stiffness could have a majorly influence on the hunting speed. Flange contact force and angle of attack increases as the operating speed is over the hunting speed of the vehicle. It is also shown that the unbalanced centrifugal force of the truck with eccentric wheelset could excite high frequency vibration periodically.