半球形金属橡胶构件变刚度特性研究及建模

为满足特殊减振器极限低频减振需求,探索金属橡胶构件变刚度特性,设计并制备了一种半球形金属橡胶构件,利用空间结构变形使其具有变刚度特性,并对其进行准静态压缩实验,研究了相对密度对半球形金属橡胶构件力学性能的影响。基于Sherwood-Frost力学模型,结合半球形金属橡胶构件的特点,对其准静态力学模型的组成形式及各项表达式进行了讨论和确定,结合不同相对密度构件的准静态压缩数据,对方程的拟合值及试验值进行对比,结果表明所建立模型的预测结果与试验结果有较好的一致性,该力学模型可用于半球形金属橡胶构件力学性能的评估,为半球形金属橡胶在极限低频减振器中的应用奠定理论与试验基础。

Research and modeling of variable characteristics of hemispherical metal rubber components

A hemispherical metal rubber was designed and prepared to meet the extreme low-frequency vibration damping requirements of special shock absorbers, and to explore the variable stiffness characteristics of metal rubber. The characteristic of variable stiffness was realized by the deformation of the space structure. The quasi-static compression experiments were carried out, and the influence of relative density on mechanical properties was studied. Based on the Sherwood-Frost mechanical model and the characteristics of the hemispherical metal rubber, the composition form and various expressions of its quasi-static mechanical model were discussed and determined. Combining the quasi-static compression data of different relative density metal rubber, the fitted and experimental values of the equation were compared. The results showed that the prediction results of the established model were in good agreement with the test results. This mechanical model can be used to e valuate the mechanical properties of hemispherical metal rubber. For the application of hemispherical metal rubber in extreme low frequency shock absorbers, theoretical and experimental foundations were laid.