论文部分内容阅读
采用计算流体动力学(CFD)和多体动力学相结合的方法研究列车高速通过站台时的风致振动及安全问题。应用有限体积法和滑移网格模拟计算方法,通过求解三维瞬态可压缩N—S方程获取列车通过站台的气动力。运用Simpack软件建立3辆编组的动车组动力学模型,轨道不平顺条件选用美国六级谱,并将用CFD得到的气动力作为激励输入动车组动力学模型,对列车高速通过站台时的气动行为进行仿真计算,得到列车高速通过站台时的振动时程曲线。计算结果表明,列车高速通过站台时,在气动力作用下3辆车均不同程度向站台靠近,且尾车的尾部向站台靠近的距离最大,达到19mm;头车向站台靠近主要是由车体的摇头运动所致,中间车向站台靠近是由车体的横向摆动所致,而尾车向站台靠拢则是由车体的横摆运动和摇头运动共同作用所致。
The method of CFD and multi-body dynamics is used to study the wind-induced vibration and safety of trains passing through the platform at high speed. The finite volume method and the sliding mesh simulation method are used to obtain the aerodynamic force of the train passing through the platform by solving the three-dimensional transient compressible N-S equation. Simpack software was used to establish three maneuvering EMU dynamics models. The track irregularities were selected from the US six-level spectrum. The aerodynamic force obtained by CFD was used as input to the EMU dynamic model. The aerodynamic behavior of the train passing through the platform was analyzed. The simulation calculation is made to get the curve of vibration time course when the train passes through the platform at high speed. The results show that when the train passes through the platform at high speed, all the 3 vehicles approach the platform with different degrees of aerodynamics, and the distance from the tail of the tail to the platform is the largest, reaching 19mm. The head to the platform is mainly composed of the body Of the shaking his head movement caused by the middle of the vehicle to the platform is caused by the lateral swing of the body, and the tail car closer to the site by the body’s yaw movement and shaking his head due to joint action.