随机振动条件下的橡胶衬套疲劳寿命预测

Fatigue Life Prediction of Rubber Bushing Based on Random Vibration

本文通过试验与有限元仿真相结合的方法,以等效最大主应变作为疲劳损伤参量建立了橡胶材料的疲劳寿命预测模型,采用Van Der Waals本构方程模拟橡胶材料的力学性能,在准确拟合橡胶衬套刚度特性的基础上,对其在实际道路随机振动条件下的寿命进行了预测。试验结果表明,该方法能够准确地预测出橡胶衬套在多轴载荷作用下的疲劳寿命。

In this research, the model was established to predict the fatigue life of rubber material through test and finite element simulation, with the equivalent maximum principal strain as fatigue damage parameter. Van Der Waals constitutive equation was adopted to simulate the mechanical properties of rubber material, and the fatigue life was predicted under the road condition and random vibration with the accurate fitting rubber bushing stiffness characteristics. In comparison with the test, this method can accurately predict the fatigue life of the rubber bushing under muhiaxial loading.