阻尼层对水润滑橡胶轴承动态性能的影响

摘要

Effects of damping layer on modal frequency and modal shape of water-lubricated rubber bearings are studied by means of finite element method in Ansys Workbench. The Pulse system is used to collect the vibration signals of the bearings. The vibration spectrum analysis method is employed to analyze the influence of the damping layer on the vibration of the water-lubricated rubber bearings. The simulation results show that comparing with non-damping bearings, the damped bearings have lower low-order natural frequencies. The test results show that for the damped bearing, there are some energy concentrations near the low-order natural frequencies, but resonance does not occur under normal operating speed (0-200 Hz). The vibration of bearing can be reduced by the damping layer, especially under high speed and high loading conditions.%利用有限元仿真方法在Ansys Workbench中研究阻尼层对轴承模态频率和模态振型的影响。使用Pulse分析平台对轴承振动信号进行采集，应用振动频谱分析方法研究实际运行过程中阻尼层对水润滑橡胶轴承振动的影响。仿真结果表明：与非阻尼轴承相比，阻尼轴承低阶固有频率较低。试验结果表明：在阻尼轴承低阶固有频率附近存在一定的能量集中，但在正常工作转速（0～200 Hz）工况下，不会发生共振；阻尼层能够降低轴承的振动，特别是在高转速、高载荷的工况下减振效果显著。