Abstract: To investigate the snow accumulation in the bogie region of high-speed trains operating in cold climates, this study established a bogie and simplified body model of the train and used the Euler-Lagrange method to study snow particle motion and deposition characteristics under crosswind conditions. The results showed that crosswinds increased the frictional velocity on the bogie surface and the shear forces acting on snow particles, reducing the probability of stable deposition. Crosswind carries a large amount of snow particles out of the bogie region from the bottom of the train, reducing the amount of snow particles that rise near the wheelset and enter the bogie region. As the crosswind speed increases, the ratio of the upward movement speed of the snow particles to the crosswind speed decreases, resulting in a reduction in the amount of snow accumulation in the bogie region. During the process where snow particles flow from the windward side through the bottom of the bogie to the leeward side and then expand and flow out of the bogie region, a large number of snow particles collide with the surface on the leeward side. Moreover, the airflow on the leeward side is obstructed by the components on the windward side, and the shear force on the snow particles on the leeward side is relatively small, making it easy for snow to accumulate.

Key words: high-speed trains, bogie, snow accumulation, discrete phase model, crosswind