关键词: 车辆工程, 半主动液压悬置, 参数辨识, 动态特性, 动刚度, 阻尼角

Abstract: The basic structure and working principle of the semi-active hydraulic mount is introduced. According to the mechanical model， the mathematic model is built, then a semi-active hydraulic mount model containing the mechanical part and fluid is built. The each inner structures, the motion situation of the fluid and gas, the open and close of the air channel are considered in the model. In order to get accurate model parameters, a test is conducted to identify the parameters such as equivalent pumping area, the rubber volumetric stiffness, the membrane volumetric stiffness and the decoupler stiffness. The model is simulated using the identified parameters, the contrast of the dynamic stiffness and loss angle between simulation and test is made to prove the reasonable and accurate of the parameter identification test and the mount model. The semi-active hydraulic mount model will provide a foundation for the mount structure optimization and full vehicle modeling.

Key words: vehicle engineering, semi-active hydraulic mount, parameter identification, dynamic characteristic, dynamic stiffness, loss angle