基于三维、非定常N-S方程,采用动网格技术对青藏线客运列车在强侧风作用下运行进行模拟,得到客车分别在桥梁、路堤、路堑及平地上运行所受到的气动力及力矩。将客车在路堤上运行的数值模拟结果与风洞实验进行对比。研究结果表明:侧向力、升力和倾覆力矩数值模拟结果与风洞实验结果均吻合较好;车速一定时,随着侧风速度的增大,列车在桥梁、路堤、平地上运行所受气动力和倾覆力矩均急剧增加,而在路堑上运行所受气动力及力矩增加缓慢;当侧风速度一定的情况下,客车在高桥上运行所受到的气动力及力矩最大,因此,强侧风下列车在高桥上运行较容易发生倾覆事故;在路堑上所受到的气动力相对最小。 Based on the three-dimensional and unsteady N-S equations, the dynamic grid technology is used to simulate the operation of Qinghai-Tibet line passenger trains under the action of strong crosswind, and the aerodynamic force and torque suffered by the passenger trains running on bridges, embankments, road and plains respectively are obtained. The results of numerical simulation of bus running on embankment are compared with wind tunnel experiments. The results show that the numerical simulation results of lateral force, lift force and overturning moment are in good agreement with the experimental results of wind tunnel. When the vehicle speed is constant, with the increase of crosswind velocity, the aerodynamic force of train running on bridge, embankment and flat ground And overturning moment increased sharply, while the aerodynamic force and moment on the cutting road increased slowly. When the crosswind speed was constant, the passenger car traveling on Takahashi had the largest aerodynamic force and torque, therefore, the strong crosswind The vehicle is prone to overturning when it runs on Takahashi; the aerodynamic forces on the cut are relatively minimal.