中文摘要：

分析一种新型的可变解耦膜刚度半主动液阻悬置的基本结构,测试其动特性。基于工程流体力学相关理论,建立与结构几何相关联,既能分析外特性、又能分析内特性的非线性集总参数模型。基于储能动刚度不动点的参数识别方法,对其空气室封闭与接通大气两种状态下的上液室体积刚度和橡胶主簧等效泵液活塞面积进行参数识别,结果表明两种状态因解耦膜刚度不同而显著改变上液室体积刚度。对所建模型进行动特性分析,经与试验结果对比,二者吻合良好,验证了模型的合理性和参数的正确性。在此基础上,建立单质量-半主动液阻悬置的隔振系统模型,对低频、高频及冲击等典型工况进行隔振性能仿真,基于力传递率探讨典型工况下系统的隔振性能,提出可变解耦膜刚度半主动液阻悬置的控制方式,对半主动液阻悬置的开发以及汽车动力总成的隔振降噪具有指导意义。

英文摘要：

The configuration of a new semi-active hydraulic mount with variable-stiffness decoupling membrane is analyzed, and the dynamic characteristics are tested. Based on the theory of engineering hydromechanics, a nonlinear lumped-parameter-model （LPM） is set up to reflect the external and internal characteristics. Based on the fixed points on dynamic stiffness in-phase, the bulk stiffness of upper chamber and the effective pump area of main rubber when the air chamber closed or connecting to atmosphere are identified. The identified results show that the bulk stiffness changes significantly in two different states because of the change of decoupling membrane stiffness. The dynamic characteristics are simulated and the samples are tested, the simulated results agree well with the experimental ones, so the LPM is reasonable and the parameters are correct. Then a single-degree-of-freedom system is modeled, the vibration isolation performance at some typical conditions such as at low frequency, high frequency and the impacted transient response are simulated, the control methods to minimize the force transfer ratio are proposed, which is helpful for the development of semi-active hydraulic mount and powertrain vibration isolation and noise reduction.