多通道式液压衬套动态特性的测试与计算分析

Experiment and Calculation of the Low Frequency Performance of a Hydraulic Bushing with Multiple Tracks

制作了不同结构类型液压衬套的实验样件,测试得到其静、动特性的变化特性,并对比分析了不同结构液压衬套的作用机理。建立了多惯性通道-多节流孔式液压衬套的集总参数模型,给出了其动刚度和滞后角的计算分析公式和滞后角峰值频率的计算公式,计算结果与实验值一致,验证了计算模型的正确性。分析了多通道式液压衬套的动特性与通道数目数量及其截面形状的关系。所采用的分析方法及结论,可为液压衬套的初级阶段的设计及选型提供参考。

The static and dynamic characteristics of hydraulic bushings with different numbers of inertia tracks and orifices were tested, and the working mechanisms of different hydraulic bushings were described. Furthermore, lumped parameter models of hydraulic bushings with multiple inertia tracks and orifices were proposed for estimating the dynamic stiffness and the loss angle. The relationships among the calculated dynamic stiffness and the loss angle with the number of the inertia tracks and the shape of the cross-section were analyzed and compared with the test data. A good correlation validates the proposed models, which can be used to analyze performances of hydraulic bushing with different structures before prototypes. © 2016, Editorial Department of JVMD. All right reserved.