A new studying method for safety of a train with attitude changing in side wind

In order to treat a time-consuming problem of synchronous simulation of aero-dynamics and dynamics of a train system,a new simulation method was proposed based on arbitrary Lagrangian Eulerian(ALE).Firstly,models for side-wind computational fluid dynamics and train multibody system dynamics were built,respectively.Then,the combined simulation was performed through using parameters passing,solution control and dynamic grid not considering track excitations,the final equilibrium state of the train in side-wind was approached gradually,and the steady attitude and the corresponding aerodynamic loads caused by the side-wind were computed more efficiently.Finally,the aerodynamic loads and track excitations were applied to the train multibody system,its dynamical performance and safety index were analyzed.