高速列车过隧道对弓网动力学影响分析

为研究高速列车通过隧道时产生的受电弓空气动力学效应对弓网动力学性能的影响，分别建立了受电弓/高速列车空气动力学仿真模型和弓网耦合系统动力学模型。采用滑移网格技术实现了高速列车运动，通过有限体积法求解三维瞬态可压缩Navier-Stokes方程和 两方程湍流模型，计算了列车速度为350km/h通过隧道时受电弓的气动抬升力，对考虑和未考虑列车通过隧道产生的受电弓气动抬升力作用时的弓网动力学响应进行了对比分析。计算结果表明，受电弓气动抬升力在隧道入口和出口时出现峰值，隧道内的气动抬升力较明线上大；通过隧道时产生的受电弓气抬升力变化对弓网接触压力和接触线抬升位移具有显著影响，导致受流质量变差。

Influence of high-speed trains passing through tunnel on pantograph-catenary dynamic behaviors

In order to study the influence of pantograph aerodynamic effect on pantograph-catenary dynamic as a high speed train passing the tunnel, the 3D aerodynamic model of the train included the pantograph, and a coupling dynamic model of the pantograph-catenary system are built. The relative motion of train is carried out through the sliding mesh technology, and the finite element volume method is used to solve the three-dimensional, compressible, unsteady N-S equation and two equation turbulence model. The aerodynamic uplift force of pantograph as the high-speed trains passing the tunnel with a speed of 350m/h is obtained. Besides that, the response of the pantograph-catenary dynamics considering aerodynamic uplift force or not are analyzed respectively. The results show that the aerodynamic uplift force of pantograph get its peak value at the entrance and exit of the tunnel, the aerodynamic uplift force of pantograph while the high speed train running inside the tunnel is higher than that on the open line, and the change of the aerodynamic uplift force of pantograph has a great effect on the contact force and the lifted displacement, which leads the quality of current collection to get worse.