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为了研究强风沙环境下高速列车运行的安全性能和气动性能,基于空气动力学理论,运用Navier-Stokes方程、标准k-ε湍流模型对气流进行连续化处理,应用DPM模型对沙粒进行离散化.算例采用欧拉-拉格朗日方法进行求解.研究结果表明:随着挟沙风速的增大,列车背风侧的涡流强度有所降低,但在背风侧的近地面,列车的流线越来越不规则;除此之外,列车车身的压力会随着挟沙风速的增大而增大,会随着沙粒直径的增大而有所降低;随着挟沙风速的增大,列车的阻力、侧力、升力均增大.随着沙粒直径的增大,列车的升力、侧力、阻力、倾覆力矩均有所降低,但比净风情况下要大.研究结果对强风沙地区合理设计高铁线路具有一定的参考价值.“,”To study the safety and aerodynamic performance of high-speed train operation under strong wind and sand environment,based on the aerodynamic theory,the Navier-Stokes equation,and κ-ε standard turbulence model are used to calculate the continuous turbulence movement of the airflow and the DPM model has used to discretization the movement of sand particles.The Euler-Lagrange model is used to solve the example.The results show that the eddy strength of the leeward side of the train decreases with the increase of the sand-carrying wind speed.While near the ground on the leeward side,the train's streamline becoming more and more irregular;In addition,the pressure of the train body will increase with the rising of the sand-carrying wind speed and decrease while the sand diameter get larger.When the sand-carrying wind speed increases,the drag,lateral force,and lift of the train increase together.With the increase of sand diameter,the lift force,lateral force,drag force and o-verturning moment of the train all decrease correspondingly,but they are larger than the net wind condition.The research results are valuable for designing high-speed railway lines in the region with severe wind and sand envi-ronments.