基于位移加载控制的金属橡胶弹性元件试验建模研究

基于电液材料试验机精确的位移加载控制，对圆环形金属橡胶弹性元件进行了动态力学试验，结果表明，金属橡胶材料具有明显的迟滞非线性性质，其阻尼由多种成分组成。根据动态试验结果建立迟滞回线拟和分解的高次弹性复合阻尼模型，该模型用非线性刚度和非线性复合阻尼机理构造，模型中的参数由试验数据辨识。用所建模型重构恢复力一位移迟滞回线．结果表明，该模型能很好描述这类非线性振动系统的特性，为进一步理论分析提供了依据。

Test Modeling Research on Mental Rubber Elastic Element based on Displacement Control

Through the precise displacement controlling of the material testing machine, the paper did dynamic tests of ring metal rubber elastic cells,the result indicated that metal rubber material had obvious hysteresis nonlinear feature and its damp is made of several kinds of elements. Hysteresis nonlinear high order elastic complex damp model is constructed by hysteresis curve fitting decomposition with the results of test. The model is constructed by a nonlinear combination of dy- namic nonlinear stiffness and dynamic nonlinear complex damping mechanisms. The parameters in the model are identified from the experimental hysteresis data. The force and displacement hysteresis curve are the reconstructed using the model with these identified parameters. The results show that the model captures the nonlinear vibration system behavior quite accurately and the proposed method is practicable for modeling of a nonlinear vibration system with hysteresis characteristics.