金属橡胶迟滞环的广义恢复力模型

金属橡胶是一种具有非线性恢复力的材料。在对其进行基于位移加载的动态试验中,其恢复力-位移曲线为一迟滞环。本文用理论和试验相结合的手段研究金属橡胶弹性元件的动力学建模,提出了一种新的模型,即广义恢复力模型。将迟滞回线分解为广义弹性力和广义阻尼力,模型中的参数由实验数据辨识。用所建模型重构恢复力-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。

A Generalized Resuming Force Model for Hysteretic Loop of Metal-rubber

Metal rubber is a kind of material with nonlinear resuming force.In the test which is based on the deve-lopment of displacement loading,its resuming force-displacement curve is a hysteretic loop.In this paper,we first analyze the dynamic models of metal-rubber theoretically and experimentally,and then put forward a new model,which is the generalized resuming force model.We resolve the hysteretic loop into the generalized elasticity force and the generalized damping force.The parameters of the model is identified from the test data.The result shows that the model can meet the requirements of dynamic analysis of metal rubber in engineering.