列车垂向振动的半主动简谐隔振研究

依据拉格郎日方程,建立六自由度列车半主动隔振系统的垂向振动模型;应用MATLAB/SIMULINK仿真模块构造列车半主动隔振系统仿真模型,对列车进行时域分析。在轨道具有简谐输入的情况下对列车的隔振性能（如隔振位移、隔振传递率等）进行了计算分析,讨论了弹簧刚度、阻尼、车速、激励的波长等对隔振性能的影响。通过研究可得列车系统采用半主动开关阻尼器,确实能够改善系统的隔振性能。

Study on Semi-Active Harmonic Vibration Isolation of Railway Vehicle with Vertical Direction Vibration

Using Lagrange equation,a six-degree of freedom vertical direction vibration model of a semi-active vibration isolation system is established for a railway vehicle.The simulation model of the semi-active isolation vibration system is established by using the "SIMULINK" module of "MATLAB" software,time-series analysis of the railway vehicle response are carried out.When harmonic input is offered by rail,the dynamic behavior(such as,transmissibility of vibration isolation,vibration displacements etc)of the railway vehicle are simulated and calculated.The influences of the spring stiffness damping,vehicle speed and wavelength of input on its behavior of vibration isolation are discussed.The results demonstrate that the semi-active vibration isolation system used in the railway vehicle can greatly improve the vibration isolation behavior of railway vehicles.