用Mooney—Rivlin模型描述橡胶材料的本构模型,通过橡胶单轴压缩试验确定橡胶材料的参数。根据发动机悬置简化模型,计算预应力和激励频率。用CATIA建立橡胶悬置的三维模型,在Hypermesh中采用六面体单元进行网格划分,建立橡胶悬置的有限元模型。利用ANSYS对有限元模型求解,用Mmlab对求解结果进行处理,根据得到的迟滞回线,计算出橡胶悬置的静刚度、动刚度和滞后角。利用本文设计的橡胶悬置特性试验测试系统分别对前、后橡胶悬置进行静、动刚度试验,将试验得到的橡胶悬置静、动刚度结果与有限元计算结果进行对比,验证了有限元模型的正确性。
The Mooney - Rivlin model was utilized to describe the constitutive model of rubber materials. The material uniaxial compression test of rubber was used to determine material parameters of rubber. According to simplified model of rubber mounting,we calculated prestress and excitation frequency. CATIA was utilized to establish three - dimensional model of rubber mounting and the hexahedral was used to establish finite element model in Hypermesh. We studied the model with the tool ANSYS and processed the ex- perimental data in the enviroment MATLAB. According to the hysteresis loop obtained, we calculated the rubber mounting static stiff- ness, dynamic stiffness and lag angle. We designed a test system for the rubber mounting characteristic. The test system was used to test the rubber mounting. Compared the FEM results with experimental results, the correctness of the proposed finite element model is verified.