Abstract:

Due to their own inherent physical limitations the conventional elastomeric bushings cannot simultaneously satisfy the conflicting requirements of low frequency shake control versus high frequency vibration isolation. But the hydrobushings can solve this problem well. The structure and the operational principles of a hydrobushing used by the suspension system in a passenger car were introduced. Meanwhile, dynamic stiffness and loss angle, two dynamic characteristic parameters were illustrated. A model of hydrobushing was built in simulation software AMESim. Based on the model, the simulation results can be gained. The mathematical software MATLAB was used to process the simulation results and make an analysis. The dynamic characteristic tests were performed with MTS831 servo-controlled hydraulic test rig. The test results prove that the model is correct and believable. Finally, this model was used to research how the model parameters affect on the dynamic behavior of hydrobushings. 

Key words: hydrobushing, AMESim, MATLAB dynamic behavior, loss angle

摘要：

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传统橡胶衬套由于自身属性的限制,不能同时降低低频抖动和隔离高频振动,而液压衬套可以较好地解决这个问题。结合某乘用车悬架系统采用的液压衬套,介绍液压衬套的结构和工作原理,阐述其动态特性参数动刚度和阻尼滞后角的物理意义。在AMESim软件中建立该液压衬套的模型并进行仿真计算,利用MATLAB软件处理仿真结果并进行分析。在MTS831试验台上完成了该液压衬套的动态特性试验,试验结果验证了所建模型的正确性。最后利用该模型研究了液压衬套相关模型参数对液压衬套动态特性的影响。

关键词: 液压衬套, AMESim仿真, MATLAB动态特性, 阻尼滞后角