Abstract:In order to study the erosion effect of high-speed train in the wind and sand environment, based on the aerodynamics theory, the Navier Stokes equation and the standard κ - ε turbulence model are used to continuous the air flow, and the DPM model is used to discrete the sand particles. The erosion effect of high-speed train under different wind speed and sand particle diameter and concentration is simulated. The Euler Lagrange method is used to solve the problem. The results show that the farther the reflected particles are from the train surface with increase of velocity and the more irregular the movement of particles near the train is with the increase of yaw angle; when the velocity is constant, the erosion rate of the train head increases with the increase of diameter; when the diameter of particles is constant, the erosion rate increases with increase of concentration, but with increase of velocity, the erosion rate decreases first and then increases, the maximum erosion rate is 2.8 times of the minimum erosion rate.