HIGH-SPEED VEHICLE-TRACK VIBRATION ANALYSIS BASED ON SPATIALLY COUPLING MODEL UNDER EFFECT OF TRACK IRREGULARITY

With the rapid development of high-speed railway, dynamic interaction between vehicles and track is strengthened. Track irregularity is the major reason that causes all kinds of dynamic response of vehicle-track coupling system. To analyze the vibration characteristics of High-speed vehicles in different speed, the vehicle-track spatially coupling dynamics model is established first. Track random irregularity that generated by the Chinese mainline track spectrum in time domain is simulated as the excitation. The dynamic response of high-speed vehicle components and track is obtained through the dynamic simulation by MATLAB. According to the results, the velocity of train has much influence on the vibration property of rail and wheel sets than car body. The results of dynamic simulation are of great significance for the vehicle vibration analysis and dynamic track irregularity estimation.