橡胶减振器动刚度有限元数值预测方法研究

提出了一种基于有限元的橡胶减振器动刚度预测方法,对方法中的材料本构模型、有限元模型、动刚度预测流程进行了分析和研究。利用此方法对某惯导减振器进行预测,获得减振器动刚度和阻尼值,代入单自由度分析模型后预报出的动响应结果与试验结果基本一致。用该方法能捕捉到由于减振器刚度变化而引入的高频率共振峰,表明该方法具有更高的精度。

A New Prediction Method of Dynamic Stiffness for the Rubber Isolator Based on Finite Element Analysis

A new prediction method of dynamic stiffness for the rubber isolator based on the finite element method was proposed.The relevant constitutive relationship model,finite element model and prediction process for dynamic stiffness were studied.A rubber isolator prediction for an IMU was performed,and the dynamic stiffness and damping values were thus obtained.The present stiffness and damping values were applied to a single freedom dynamic response analysis,the analysis results of dynamic response are consistent with the testing results.Moreover,the high frequency resonance due to dynamic stiffness changes can be calculated during the middle and high frequency by using the stiffness prediction method,which indicates the method has higher calculation precision comparing with traditional prediction methods of static stiffness.