摘要
根据拉格朗日方程得出了RFPS滚珠摩擦摆与碟型弹簧组成的三维复合隔震地板动力反应分析运动方程,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:当选取合适的计算参数时,隔震地板能使上部浮放物的地震反应水平加速度及竖向加速度减小,并使浮放物的位移控制在合理的范围内;控制浮放物加速度所需要的参数范围与控制位移所需要的参数范围有部分相同的分布区域及变化趋势,隔震地板设计要求较小的接触面摩擦系数0.05<μ<0.1,适中的滑道半径0.6<R<1.0 m,较小的弹簧刚度系数及较大的阻尼系数。
A theoretical analyzing approach about the compound floor isolation system consisting of RFPS and dish spring is derived. It starts from the Lag'range equation, with the coupling effect of the horizontal vibration and vertical vibration being included. Computation results show that for the proper specifications, the floor isolation system may exhibit good effectiveness in mitigating the acceleration of the unfixed objects or equipments in both horizontal and vertical direction,while the extra displacement could be limited to be in a manageable range. The expected parameters for mitigating the accelerations agree with that for displacements in a partial domain. The specification of a floor isolation system needs low friction coefficient on the slide 0.05 〈μ 〈 0.1, a reasonable slide radius 0. 6 〈μ 〈 1. 0m,a relatively low stiffness coefficient and relatively high damp coefficient of the dish spring.
出处
《河北联合大学学报(自然科学版)》
CAS
2012年第4期84-89,共6页
Journal of Hebei Polytechnic University:Social Science Edition
基金
河北省科技厅项目(11215120D)