中文摘要：

高速列车的振动特性直接影响旅客乘坐的舒适性和列车运行的安全性．为了分析不同线路条件和运行速度对高速列车振动特性的影响，建立了车辆-轨道耦合系统模型，并以德国高速轨道谱和我国干线轨道谱产生的轨道随机不平顺作为耦合系统的激励，通过Newmark数值积分和Matlab仿真，计算了高速车辆在高速线路和提速干线条件下车体、构架、轮对等车辆各部件和轨道部件的振动响应．研究结果表明，随着列车运行速度的提高，高速车辆各部件振动响应均显著增大；线路条件对高速列车轮对及轨道系统振动的影响较对车体系统振动的影响明显．

英文摘要：

Vibration property of high-speed vehicles influences riding comfort and operation safety. A vehicle-track coupling system model is established to analyze the vibration responses of high-speed vehicle under the various operation velocity and track conditions in this paper. The track irregularity, simulated on the German high-speed railway PSD and China Main Line PSD, is introduced to the coupling system model as the railway excitation. Newrnark numerical integration method is used to solve the dynamic response of high speed vehicle and track components and the simulation results are obtained by MATLAB program. The results show that the vibration response of vehicle components increases obviously with the speed increasing. Track conditions have great effect on the dynamics of the wheelset and track system, compared to the acceleration of the car body.