Polygonal Wear Mechanism of High-Speed Train Wheels Based on Lateral Friction Self-Excited Vibration

This work details research on the formation mechanism of wheel polygonalization in high-speed trains and its effect factors by numerical modeling order to prevent increasingly prevalent problem polygonal wear. The lateral self-excited vibration model a was developed using LuGre friction theory. properties crucial condition Hopf bifurcation were investigated; process wear simulated results validated field tracking data. demonstrated that periodic generated is required for attrition at given speed. wheel’s has following characteristics: “Constant speed—Self-excited—Fixed frequency—Divisible.” polygon determined ratio frequency rotational frequency. Wheel caused vertical dynamic force rail. findings study can serve as theoretical foundation prediction reduction