FPS摩擦摆与碟型弹簧组合隔震系统性能分析研究

Analysis about the Compound Seismic System Consisting of FPS and Dish Spring

根据多体动力学理论相对动能定理推求了FPS滑移式摩擦摆与碟型弹簧组成的三维复合隔震系统动力反应分析计算公式,考虑了竖向振动与水平向振动的耦合作用。分析与计算结果表明:隔震系统在水平向与竖向都具备必要的隔震特性.当滑道半径为1～2m、滑动摩擦系数为0.01左右时,水平向隔震效率可达85%左右,在竖向也能有效减小受压层间位移与防止出现受拉层间位移。滑道曲率对体系竖向振动的扰动很小,可不考虑水平向与竖向的耦合作用,各自单独计算。

A theoretical analyzing approach about the compound seismic isolation system consisting of FPS and dish spring is derived.It starts from the relative kinematics energy theorem in multiply-body dynamics,including the coupling effect of the level vibration and vertical vibration.Computation results show that this system has the necessary isolation capability and reposition capability in both directions;It is shown that when slide radius is in the range of 1 ～ 2m and the slipping friction coefficient is about 0.01,the seismic isolation effectiveness could be as high as 85%,while the coupling effect in two directions is so small that it could be neglected and the dynamic responses could be calculated with respect to each of two individual directions.