基于SIMPACK的车下设备垂向隔振参数研究

Study on Vertical Vibration Isolation Parameters of the Car Bottom Equipments Based on SIMPACK

以具有双层隔振系统的柴油发电机组为研究对象,对轨道列车车下悬挂设备与列车车体之间的耦合振动进行研究。首先建立起一个三自由度的力学模型进行振动分析,然后据此建立对应的车体-动力包耦合振动微分方程,并推导出动力包的振动烈度与垂向隔振参数之间的函数关系,最终选取振动烈度作为评价准则,研究在双层隔振系统中隔振弹簧的两大参数垂向刚度和垂向阻尼对振动烈度产生的影响。结果显示:列车隔振系统中隔振器刚度主要对列车运行平稳性产生影响,而隔振器阻尼则主要影响列车柴油发电机组的振动烈度;参考列车运行平稳性及柴油发电机组振动烈度两大指标,可以为列车隔振系统参数的选取提供一定的参考依据。

To researching coupled vibration between the bottom suspension equipments and the car body,this paper adopts double-layer vibration isolation system of diesel generator set as the research object,by establishing respectively the three degrees of freedom model to analyze its vibration response,then the car body-power pack coupling vibration differential equations are established,the relation of the power pack vibration intensity and the vertical vibration isolation parameters has been derived,then select equipment vibration intensity for evaluation criteria,study the vertical stiffness and vertical damping of spring of the double-layer vibration isolation system effect on the vibration intensity of equipment. Calculation results show that vehicle running stability is mainly affected by the vibration isolator stiffness,diesel generating set vibration intensity is mainly affected by vibration isolator damping;Taking the vehicle running stability and vibration intensity of diesel generator set as evaluation index can provide the reference for isolation system to select suitable vibration isolation parameters.