Influence of the Parameters of Track on the Wheel-Rail Dynamic Interaction due to the Rail Welding Joint of Heavy Haul Railways

Based on the theory of vehicle-track coupled dynamics and the vertical coupled model between 30t-axle-load freight car and track,the influence of the parameters of track on the wheel-rail interaction is analyzed,when the vehicle passes through the tangent track with rail welding joint. Results indicate that the wheel-rail interaction will be enhanced with increase of the stiffness and damping of rail pad. The wheel-rail interaction will be reduced gradually with increase of the interval of sleepers. Meanwhile,if the mass of sleeper increases,the wheel-rail interaction will be strengthened slightly,and vibration of sleeper will be decreased obviously.