颗粒阻尼器随机控制研究  

Research on stochastic response control of particle damping system

作　　者：鲁正[1,2] 张泽楠 廖元 LU Zheng;ZHANG Zenan;LIAO Yuan(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]同济大学结构工程与防灾研究所,上海200092

出　　处：《地震工程与工程振动》2018年第4期16-20,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51478361)~~

摘　　要：颗粒阻尼器是一种减振性能良好的被动控制装置。由于其呈现较强的非线性特征,本文基于将多颗粒等效为单颗粒的原则,采用等效线性化的方法通过四阶龙格库塔迭代计算,获得颗粒阻尼结构体系在随机振动下的均方根响应,继而对其设计参数进行分析。研究结果表明对于给定的颗粒阻尼结构体系,存在最优的自由行程d使结构加速度均方根最小,同时质量比μ的最优取值与自由行程d紧密相关。The particle damper（ PD） is an efficient passive control strategy for earthquake induced vibration control of structures. Considering the nonlinear restoring force behavior of the particle damper,the stochastic response of a particle damping structural system based on an equivalent single particle unit model is first derived using a nonstationary random process and time-dependent equivalent linearization with fourth order Runge-Kutta method. A parametric study is then performed to evaluate the potential influences of earthquake excitations properties. For a given particle damping structural system and excitation,it is observed that an optimal gap clearance d exists for minimizing the root mean square absolute acceleration response of structures. Furthermore the optimal mass ratioμ,which is not always effective as its increasing,is closely related to the gap clearance d.

关 键 词：被动控制 颗粒阻尼器 随机分析 等效线性化 

分 类 号：TU4[建筑科学—土工工程]