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

ABSTRACT

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 ω > 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 $\zeta \le 0.1$, 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.

KEYWORDS:

• High-speed train
• crosswind
• dynamic characteristics
• wheel–rail collision vibration
• lateral shift
• parameter
• chaos

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (NSFC) under Grants [72061021, 62063013], Science and Technology Plan Project of Gansu (21JR7RA284, 20JR10RA251), Youth Fund Project of Lanzhou Jiaotong University (2021018).