Impact of Wheel Wear on Dynamics Performance of CR200J EMU Trailer and Control Cars

Abstract

Objective In response to stability alarm faults occurring in CR200J EMU trailer and control cars in certain sections, it is necessary to analyze the factors affecting the dynamics performance to analyze the causes and address the issues. Method Tracked measurements are conducted on the wheel wear status of a set of CR200J EMU trailer and control cars. The actual rail profiles along the operating routes of vehicles are measured to identify the development patterns of wheel wear. Through SIMPACK software simulation, and combined with real wheel-rail matching conditions, the impact of wheel wear on vehicle dynamics performance is analyzed. Result & Conclusion The wheel wear of CR200J EMU trailer and control cars mainly concentrates at the rolling circle. As wheel wear increases, changes occur in the wheel-rail contact relationship, leading to a linear increase in wheel equivalent conicity, and noticeable changes in lateral stability indicators of the vehicles. Some sections of the measured track profiles exhibit abrupt changes, causing lateral harmonic motion in the bogies. Finally, based on the patterns and characteristics of wheel wear, improvement suggestions are proposed.

Keywords

• cr200j emu
• dynamics performance
• wheel wear
• equivalent conicity
• stability