摩擦摆系统振动性态的进一步分析

Further Analysis for the Vibration Performances of Friction Pendulum Systems

基于摩擦摆 (FPS)及其隔震剪切型结构的非线性振动微分方程 ,进一步研究了该系统的振动性态。利用平均法得到了 FPS自治振动的一阶近似解。计算分析了 FPS系统在简谐激励作用下的稳定性及恢复力特性。一个FPS隔震多层剪切型结构对三种水平地震作用响应的计算结果表明 ,尽管会引起结构的竖向附加振动 ,FPS仍具有良好的限位水平能力和隔离水平地震作用的效应。

Based on the nonlinear vibration equations of friction pendulum systems(FPS) and FPS based shear typed buildings, the vibration performances of the systems are studied in more details. The first approximated solution to autonomous FPS is obtained by the method of average. The features of vibration stability and restoring forces of FPS under harmonic excitations are analyzed. The computational results of the responses of a FPS based multi story shear typed structure to three different horizontal earthquake actions demonstrate that vertical vibrations of FPS based structures are produced, but FPS bearings have good rotation restricting capability and high capacity of isolating horizontal earthquake actions.