Dynamic characteristics of wheel-rail collision vibration for high-speed train under crosswind

This paper focuses on the dynamic characteristics of wheel-rail collision vibration for high-speed train under crosswind. The wind load model is established by using fast Fourier transform harmonic synthesis method and Davenport coherence function, the lateral displacement of wheelset of high-speed train under crosswind is calculated, the dynamic model of wheel-rail collision vibration system of high-speed train under crosswind is established. The effects of vibration frequency, wheel-rail clearance and lateral damping on the characteristics of wheel-rail lateral clearance impact vibration system of high-speed train are discussed. Numerical simulation results show that the impact velocity of wheelset collision on left and right rails increases with the increase of vibration frequency. When omega > 3.3, the system changes from chaos state to single period stable state through inverse doubling bifurcation; when b < 0.0033, it is in a chaos state, and with the increase of b, the inverse doubling bifurcation occurs until the hunting motion of the wheel-rail system is in a stable state; when zeta <= 0.1, the system is in a stable single period operation state, and with the continuous increase of zeta, it begins to have hop bifurcation, enters a multi-period and chaos state, and finally it is in a stable single period operation state.

Automated summary

This paper focuses on the dynamic characteristics of wheel-rail collision vibration for high-speed train under crosswind. The effects of vibration frequency, wheel-rail clearance, and lateral damping on the characteristics of wheel-rail lateral clearance impact vibration system of high-speed train are discussed. Numerical simulation results show that the impact velocity of wheelset collision on left and right rails increases with the increase of vibration frequency.