基于SMA-压电阻尼器的巨-子结构智能控制
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摘要
针对巨-子结构体系,提出在巨-子结构间设置柔性隔震层,并增设一种SMA-压电复合智能阻尼器,形成巨-子结构智能控制体系,可有效改善巨-子结构的抗震安全性。介绍了SMA-压电阻尼器的工作原理与力学模型,建立了巨-子结构体系智能控制体系的分析模型,在此基础上构建了巨-子结构智能控制体系的运动方程。基于限界Hrovat最优控制算法和H2/LQG算法设计了巨-子结构智能控制体系的半主动控制器,进行了Simulink控制效果仿真分析,并与传统抗震,被动隔震,SMA-压电阻尼器的Passive-on、Passive-off控制和理论最优的主动隔震控制策略进行了系统的对比研究。仿真分析结果表明,SMA-压电阻尼器实施智能隔震控制时可兼顾主结构与子结构的控制效果,其控制效果与主动控制时接近,远优于被动控制策略。所提出的巨-子结构智能控制体系可望应用于实际工程中,并取得较好的经济和社会效益。
This paper proposes a novel smart mega-sub control system,in which seismic isolators are inserted between the mega-structure and sub-structure,and a SMA-piezoelectric composite intelligent damper is installed in the isolation layer to enhance the safety of mega-sub structure system. The working principle and mechanical model of this SMA- Piezoelectric damper was presented. The analytical model of the smart mega-sub control system was built,and the governing equation of the smart Mega-sub control system was established. An H2 / LQG control algorithm was used for primary controller design,and clipped Hrovat algorithm was employed for semi-active controller design. Numerical simulation of different controllers for the mega-sub control system were carried out within the environment of Simulink and compared systematically. Results show that the semi-active control strategy can achieve very similar performance to the pure active case,and outperforms the passive control strategies. The proposed smart mega-sub control system based on SMA-piezoelectric damper may achieve good economic and social benefits,which is of practical significances and good application prospect.
This paper proposes a novel smart mega-sub control system,in which seismic isolators are inserted between the mega-structure and sub-structure,and a SMA-piezoelectric composite intelligent damper is installed in the isolation layer to enhance the safety of mega-sub structure system. The working principle and mechanical model of this SMA- Piezoelectric damper was presented. The analytical model of the smart mega-sub control system was built,and the governing equation of the smart Mega-sub control system was established. An H2 / LQG control algorithm was used for primary controller design,and clipped Hrovat algorithm was employed for semi-active controller design. Numerical simulation of different controllers for the mega-sub control system were carried out within the environment of Simulink and compared systematically. Results show that the semi-active control strategy can achieve very similar performance to the pure active case,and outperforms the passive control strategies. The proposed smart mega-sub control system based on SMA-piezoelectric damper may achieve good economic and social benefits,which is of practical significances and good application prospect.
引文
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[9]戴纳新.基于压电-SMA变摩擦阻尼器的智能隔震系统试验与理论研究[D].长沙:湖南大学,2012.DAI Naxin.Experimental and theoretical research on the smart isolation system using PZT and SMA complex friction dampers[D].Changsha:Hunan University,2012.(in Chinese)
[10]戴纳新,谭平,周福霖.新型压电变摩擦阻尼器的研发与性能试验[J].地震工程与工程振动,2013,33(3):205-214.DAI Naxin,TAN Ping,ZHOU Fulin.Piezoelectric variable friction damper and its performance experiments and analysis[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(3):205-214.(in Chinese)
[11]WANG S G.Linear quadratic Gaussian-Alpha control with relative stability and gain parameter for the structural benchmark problems[J].Journal of Engineering Mechanics,2004,130(4):511-517.
[12]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,2003.OU Jingping.Structure Vibration Control-active Control,Semi-active Control and Intelligent Control[M].Beijing:Science Press,2003.(in Chinese)
[13]Hrovat D,Barak P,Rabins M.Semi-active versus passive or active tuned mass dampers for structural control[J].Journal of Engineering Mechanics,1983,109(3):691-705.
[2]FENG M Q,Mita A.Vibration control of tall buildings using mega subconfiguration[J].Journal of Engineering Mechanics 1995,121(10):1082-1088.
[3]CHAI W,FENG M Q.Vibration control of super tall buildings subjected to wind loads[J].International Journal of Nonlinear Mechanics,1997,32(4):657-668.
[4]王肇明,邓洪洲,董军.高层巨型框架悬挂结构体系抗震性能研究[J].建筑结构学报,1999,2(1):23-30.WANG Zhaoming,DENG Hongzhou,DONG Jun.A study of aseismic properties of Huge Frame Suspended structure in tall buildings[J].Journal of Building Structures,1999,2(1):23-30.(in Chinese)
[5]连业达,张洵安,王朝霞.巨、子结构质量比对新型有控结构建筑结构的影响研究[J].振动与冲击2007,26(8):113-115.LIAN Yeda,ZHANG Xunan,WANG Zhaoxia.Research on the influence of mass ratio for new mega-sub controlled structure.[J].Journal of Vibration and Shock,2007,26(8):113-115.(in Chinese)
[6]裴星洙,汪玲.附加阻尼的悬挂式巨型框架复合支撑体系地震响应分析[J].振动与冲击,2011,30(11):191-197.PEI Xingzhu,WANG Ling.Earthquake response analysis of mega-suspended braced frame attacted with damper[J].Journal of Vibration and Shock,2011,30(11):191-197.(in Chinese)
[7]蓝宗建,田玉基,曹双寅,等.巨型框架多功能减振结构体系的减振机理及其减振效果分析[J].土木工程学报,2002,35(6):1-5.LAN Zongjian,TIAN Yuji,CAO Shuangyin,et al.The mechanism and efficiency of multifunctional vibration-absorption for Megaframe structures[J].China Civil Engineering journal,2002,35(6):1-5.(in Chinese)
[8]谭平,李祥秀,刘良坤,张颖.巨-子结构控制体系的减震机理及性能分析[J].土木工程学报,2014,47(11):55-63.TAN Ping,LI Xiangxiu,LIU Liangkun,et al.Control mechanism and performance analysis of a mega-sub structure control system[J].China Civil Engineering Journal,2014,47(11):55-63.(in Chinese)
[9]戴纳新.基于压电-SMA变摩擦阻尼器的智能隔震系统试验与理论研究[D].长沙:湖南大学,2012.DAI Naxin.Experimental and theoretical research on the smart isolation system using PZT and SMA complex friction dampers[D].Changsha:Hunan University,2012.(in Chinese)
[10]戴纳新,谭平,周福霖.新型压电变摩擦阻尼器的研发与性能试验[J].地震工程与工程振动,2013,33(3):205-214.DAI Naxin,TAN Ping,ZHOU Fulin.Piezoelectric variable friction damper and its performance experiments and analysis[J].Journal of Earthquake Engineering and Engineering Vibration,2013,33(3):205-214.(in Chinese)
[11]WANG S G.Linear quadratic Gaussian-Alpha control with relative stability and gain parameter for the structural benchmark problems[J].Journal of Engineering Mechanics,2004,130(4):511-517.
[12]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,2003.OU Jingping.Structure Vibration Control-active Control,Semi-active Control and Intelligent Control[M].Beijing:Science Press,2003.(in Chinese)
[13]Hrovat D,Barak P,Rabins M.Semi-active versus passive or active tuned mass dampers for structural control[J].Journal of Engineering Mechanics,1983,109(3):691-705.