【摘要】 将基础隔震结构用双自由度振动体系模拟，在建立振动运动方程时考虑振动系统非比例 阻尼效应，用小参数展开法导出了体系动力特性的近似解析解，用拉普拉斯变换方法获得该 种隔震结构地震时域响应的积分解，并在数值算例中分析了等代体系动力特性及地震响应计 算结果的精度．更多还原

【Abstract】 ：The base-isolated struc ture is simulated with a 2-DOF vibration system, and the equation of motion is established by way of considering the non-proportional damping effect. An a pproximate ana lytical solution of the dynamic characteristics of the system is derived by usin g small parameter extension method, and the time-domain earthquake response of the isolated structure is obtained on the basis of Laplace transform method. The accuracy of the dynamic characteristics and response results of the system is a nalyzed through a numerical example at the end of the paper.更多还原