车下设备与车体接口双层隔振系统隔振参数研究

Study on Vibration Isolator Parameters of the Double-layer Vibration Isolation System of Body-equipment EMU

合理的隔振参数选择对于有效避免车体及附属设备的耦合共振至关重要。以某动车组车下吊挂设备为研究对象,分别计算得出安装架、设备和风机的隔振器动刚度值,并建立安装架、设备和风机的静平衡方程,得到隔振器的静刚度值,并对选取的静刚度值进行了静平衡验证,结果表明所设计的隔振参数均能满足车体—设备的隔振需求。并对车体—设备主要部件进行模态匹配分析,结果表明车体—设备隔振器参数设计能够使设备部件之间以及与车体间不发生耦合共振。

Reasonable choice of vibration isolation parameters is very important for avoiding the vehicle＇s body and additive equipment coupled resonance. In this paper, an EMU of hanging equipment was taken as an object for study. The dynamic stiffness of the vibration isolators of the mounting frame, equipment and fan was calculated. The static equilibrium equations of the mounting rack, the equipment and the fan were established, and their static stiffness values were obtained and verified by the static balance condition. The results show that the vibration isolation parameters in the vibration isolation design can meet the needs of the body-equipment isolation. Finally, the modal match between the body and the main equipment components was analyzed. Results of the analysis show that there is no coupling resonance among the equipment parts and the vehicle body with these body-equipment vibration isolator parameters.