DFPS摩擦盘与碟型弹簧组合隔震系统性能分析

Analysis of the Compound Seismic System Consisting of DFPS System and Dish Spring

根据多体动力学理论相对动能定理推求了DFPS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,即隔离能力与复位能力;依靠摩擦作用与结构自身阻尼可以消耗传入结构的能量.当滑道半径为1～2 m、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,同时具有较好的消能效果与复位能力.这时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 analysis approach of the compound seismic isolation system consisting of DFPS and dish spring is derived.It starts from the relative kinematic 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;the slipping friction forces at the contacting surface provide the energy dissipation capability.When the slide radius is in the range of 1-2 m and the slipping friction coefficient is about 0.01,the seismic isolation effectiveness can be as high as 85%,while the coupling effect in two directions is so slight that it can be neglected and the dynamic responses can be calculated in each direction,respectively.