Transverse vibration of high-speed maglev train under dual stochastic excitations of crosswinds and maglev track irregularities

Abstract

The high-speed maglev train is regarded as one of the primary directions for the future advancement of high-speed transportation systems due to its rapid velocity and environmentally friendly characteristics. Nevertheless, the transverse vibration of a high-speed maglev train is significantly challenged by the dual stochastic excitations of the crosswinds and the maglev track irregularities. In this study, a simplified numerical model for the transverse dynamics of an EMS-type high-speed maglev train is established, employing a traditional proportional-derivative (PD) controller. The improved fast stochastic analysis method based on pseudo-excitation method is utilized to solve the stochastic transverse dynamical responses. The damping matrix of the high-speed maglev train exhibits strong non-proportional characteristics as the derivative factor is relatively large. The improved fast stochastic analysis method is capable to effectively enhance the computational efficiency of the stochastic responses. The results demonstrate that the correlation between track irregularities and transverse vibrations is strong. With the increase in mean wind velocity, the stochastic response of the high-speed maglev train, which is relatively low-frequency (below the natural frequency), also increases notably. Crosswinds exceeding 15 m/s and maglev track irregularities have significant impacts on the running smoothness of the high-speed maglev train.