磁流变阻尼器半主动振动控制算法计算研究  

Algorithm for semi-active vibration control on structures with magnetorheological dampers

作　　者：何茜茜 葛楠 张馨圆 HE Xi-xi;GE Nan;ZHANG Xin-yuan(College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学建筑工程学院,河北唐山063210

出　　处：《广西大学学报（自然科学版）》2018年第4期1408-1414,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51378170)

摘　　要：建立了一栋20层磁流变阻尼器半主动控制的结构分析模型,并用Matlab语言编程求解。计算结果表明:半主动磁流变阻尼器控制对层间位移和楼层位移有较明显的减震效果,调整其参数指标fdmax可以达到目标减震效果。fdmax越大,层间位移以及楼层位移动力反应减震效率也越高。减震效率可达到25%~50%,且减震效率沿房屋高度分布均匀。半主动磁流变阻尼器控制Bang-Bang算法对楼层加速度减震效果较差,对加速度减震有要求的房屋可能不宜采用。A theoretical approach about the vibration mitigation system,a 20-storey structure with magneto-rheological dampers,is presented,and the system is solved with Matlab.Results show that the system is effective in vibration mitigation and can be optimized with the reasonable increase of fdmax.A larger fdmax corresponds to larger seismic mitigation efficiency and larger semi-control forces.The seismic mitigation efficiency is generally 25%-50%with relatively even distribution along the structural height.It might be recognized that the seismic mitigation efficiency for storey acceleration is not satisfying.Bang-Bang algorithm for the semi-active magnetorheological dampers are not recommended for buildings with acceleration mitigation requirement.

关 键 词：状态变量 黎卡提方程 主振型 层间位移 龙格-库塔方法 

分 类 号：TU375.4[建筑科学—结构工程]