基于MR阻尼器高耸钢塔结构风振半主动控制
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摘要
针对上海即将兴建的某300 m高耸钢塔结构,提出了一种基于LQG控制(线性二次型高斯最优控制)的跟踪控制策略,并通过基于Davenport谱的脉动风速模拟,对其在有无施加半主动跟踪控制下进行了风振时程响应的动力分析和比较.结果表明:这种风振半主动控制算法对其脉动风作用下的加速度响应具有极其优良的控制品质和控制效果,为高耸钢塔结构脉动风作用下的舒适度设计提供了一种独特的控制装置和方法,大大降低了此类构筑物风振控制设计的成本.
As for a 300 m high-rising steel tower to be built in Shanghai,a tracking control algorithm is put forward based on LQG control theory with MR damper.A comparative study of the dynamical responses show that the proposed method can suppress significantly the fluctuating wind-induced acceleration.This paper presents a unique control device and effective control algorithm with a good control effect for high-rising steel tower wind-induced vibration control design.
As for a 300 m high-rising steel tower to be built in Shanghai,a tracking control algorithm is put forward based on LQG control theory with MR damper.A comparative study of the dynamical responses show that the proposed method can suppress significantly the fluctuating wind-induced acceleration.This paper presents a unique control device and effective control algorithm with a good control effect for high-rising steel tower wind-induced vibration control design.
引文
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[2]欧进萍.结构振动控制——主动、半主动和智能控制[M].北京:科学出版社,2004.OU Jinping.Structural vibration control—active control,semi-active control and smart control[M].Beijing:Science Press,2004.
[3]周云,徐龙河,李忠献.半主动磁流变阻尼控制结构的地震反应分析[J].地震工程与工程振动,2000,20(2):107.ZHOU Yun,XU Longhe,LI Zhongxian.Earthquake responseanalysis on semi-active vibration control of MR damper[J].Earth-quake Engineering and Engineering Vibration,2000,20(2):107.
[4]Spencer B F.Modeling and control of magnetorheological damperfor seismic dampers[J].Smart Materials and Structures,1996,16(5):63.
[5]王之宏.风荷载的模拟研究[J].建筑结构学报,1994,15(1):44.WANG Zhihong.Study on wind load simulation[J].Journal ofBuilding Structure,1994,15(1):44.
[6]王肇民,马人乐,何敏娟.塔式结构[M].北京:科学出版社,2004.WANG Zhaomin,MA Renle,HE Minjuan.The tower structure[M].Beijing:Science Press,2004.
[7]Melboume W H,Ceung J C K.Designing for serviceable accelera-tions in tall buildings[C]//Proc of the Fourth Int Conf On TallBuildings.Hong Kong:[s.n.],1998:148-155.
[8]赵林.结构振动半主动控制及其实用性研究[D].天津:天津大学建筑工程学院,2004.ZHAO Lin.Research on semi-active control of structural vibrationand its application[D].Tianjin:Tianjin University.College ofCivil Engineering,2004.
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