橡胶减振支座动态性能仿真分析研究

摘要

Based on three hyperelastic rubber material constitutive models of Mooney-Rivlin, Ogden 3 order and Van der Waals, and taking into consideration of influencing factors of load frequency, load amplitude and load mean value,the finite element models of rubber damping brackets of wind driven generator were established respectively and the dynamic properties of rubber damping brackets were made numerical simulation. Through rubber brackets dynamic bearing test, the effects of constitutive models of different rubber materials on simulation accuracy of rubber elastic parts were analyzed. The analysis of rubber damping bracket simulation and dynamic bearing test result error both indicated that Van der Waals model was suitable for compressing and shearing deformation load cases, Mooney-Rivlin model was for small or medium deformation load cases and Ogden 3 order model was for large deformation load cases. The appropriate rubber material constitutive model needs to be selected to improve the precision of FEA according to load cases.%基于Mooney-Rivlin、Ogden 3阶和Van der Waals三种橡胶超弹材料本构模型，考虑载荷频率、载荷幅值、载荷均值诸因素影响，分别建立风力发电机橡胶减振支座有限元模型，对橡胶减振支座动态性能进行数值模拟。通过橡胶支座动态承载测试实验，分析不同橡胶材料本构模型对橡胶弹性元件仿真精度的影响。橡胶减振支座仿真分析与动态承载实验结果的误差分析显示，压剪变形载荷工况适合选用Van der Waals模型；Mooney-Rivlin模型适合中、小变形载荷工况；Ogden 3阶模型则更适合较大变形载荷工况。为提高橡胶弹性元件有限元仿真精度，应根据所受载荷工况选用合适的橡胶材料本构模型。