Influence of Posture Change on Train Running Safety under Crosswind

High-speed trains serving in a crosswind region are bearing more significant safety risks. Based on the three-dimensional (3D) Unsteady Reynolds-Averaged Navier–Stokes (URANS) turbulence model, Computational Fluid Dynamics (CFD) computational work was conducted present study to predict transient aerodynamic load of train. The then employed as input dynamic system perform analysis running safety. Noticeable changes coefficients were found when train entered and left due dramatic change flow patterns. original posture also provided train’s responses. A slightly larger maximum derailment coefficient first bogie leading car with preset posture. There obvious differences displacement characteristics three cars lateral direction rolling rotation, magnitude decreased from trailing car. consideration proven withstand weaker crosswinds.