高速列车隧道交会对列车横向振动的影响研究

Influence Research on Lateral Vibration of High-speed Trains Intersection inside Tunnel

为了研究隧道交会气动载荷对高速列车横向振动的影响,建立了某型号8节编组高速列车数值仿真计算模型。基于三维、非定常、可压缩的Navier-Stokes方程以及k-ε两方程湍流模型和滑移网格技术,数值模拟了高速列车在隧道内交会时的气动特性。通过建立8节编组的车辆系统动力学模型,研究了列车交会气动载荷对列车车辆系统动力学响应(列车的安全性和平稳性)的影响,研究结果表明:隧道交会气动载荷对列车的动力学性能的影响非常明显;当列车在隧道交会时,列车的横向振动加剧,列车的安全性和平稳性明显降低,其中头车、中间车和尾车的轮重减载率增加幅值分别为:14.4%、13.3%和9.1%;横向平稳性指标增加幅值分别为:10.66%、12.40%和5.22%。

In order to study the effects of the aerodynamic load generated in train crossing inside tunnels on lateral vibration of High- speed train, a simplified High-speed train （8-car）simulation model was established. Based on the three dimensional, unsteady and compressible Navier-Stokes equations, κ-ε two equations turbulence model and the sliding-mesh technology, the numerical simulation of the aerodynamic characteristics generated in train crossing inside tunnels was achieved. A vehicle system dynamic model was established. With the vehicle system dynamic model, the vehicle system dynamic response of High-speed trains could be simulated in the case o{ con sidering the aerodynamic load and not considering the aerodynamic load. The security and stability of High-speed trains were analyzed and discussed in both cases. The results show as follow： the aerodynamic load generated in train crossing has a significant impact on the dynamic behaviors of High speed trains. When train crossing inside tunnels, the vibration of High-speed trains is significantly increased and the security and stability of High-speed trains are reduced obviously. The wheel unloading of the head car, the middle car and the tail car increases by 14.4 %, 13.3 % and 9.1 % respectively and the lateral stability index increases by 10.66 %, 12.40% and 5.22 %.