横风作用下列车在高架桥上运行的气动特性分析

使用计算流体力学方法研究横风条件下列车在高架桥上运行的气动特性和倾覆的危险性。基于三维N-S方程，采用滑移网格技术对列车运行进行数值模拟，并与在地面上运行作对比数值模拟计算。研究结果表明列车在高架桥上运行所受到的气动力随着侧风强度的增加而剧烈增加，随着车速的增加而缓慢增加；和地面路况运行相比，列车在计算模型中的高架桥上运行并未增大倾覆危险性。

Aerodynamic characteristics of high-speed trains on bridge under the cross-wind

Aerodynamic characteristics and the risk of overturning of high-speed train on bridge under the cross wind were studied using computational fluid dynamics method. To simulate numerically the train traveling on bridge, the three-dimensional Navier-Stokes equations were solved using sliding mesh technique, the simulation results were compared with the results of movement on the ground. Aerodynamics taken place on the bridge increase greatly as the cross-wind increase, while growing slow as the speed of train increase. The overturning risk of the movement on the bridge of the calculation model is not higher than the operation on the ground.