【作者】 葛楠； 苏幼坡； 王兴国；

【Author】 GE Nan SU Youpo WANG Xingguo (Hebei Polytechnic University,Tangshan,Hebei 063009)

【机构】 河北理工大学建筑工程学院；

【摘要】 根据多体动力学理论中的动能定理推求了椭圆曲线弧面滑道辊轴摩擦摆隔震系统动力反应分析计算公式。辊轴放置在具有椭圆内凹曲线形状的上、下盘滑道中间,形成辊轴式摩擦摆。分析与计算结果表明:这种摩擦摆具有隔震系统所必需特性。较长的自振周期使其具有必要的隔离能力。依靠重力可以使其复位。由在辊轴与上、下盘接触面的滚动摩擦力偶可以消耗传入结构的能量。一个实例计算结果表明,这种摩擦摆具有很好的隔振效果。更多还原

【Abstract】 A theoretical analyzing approach about a class of seismic isolation system RFPS(Rolling Friction Pendulum System) is presented..It starts from the relative kinematics energy theorem in multiply body dynamics. This system consists of a roller which is placed in the vicinity of two ellipse concave slides.Computation results for ellipse slide show that it has the three kinds of necessary functions required for an effective isolation system. The relatively long vibration period provides the necessary isolation capability,the gravity provides the reposition capability,and the friction couple,formed with the rolling friction forces at the contacting surface on the top and bottom plate respectively,provides the energy dissipation capability.The evaluation results for a practical building model showsthat RFPS has a satisfactory seismic isolation effect.更多还原