磁流变式调谐液柱阻尼器的离复位控制
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摘要
提出了抑制水平振动的磁流变式调谐液柱阻尼器(MR-TLCD)模型,建立了单自由度结构——MR-TLCD的耦合运动方程。从系统动力方程出发,根据离复位控制策略,确定了MR-TLCD与单自由度结构相互作用过程中的合理阻尼大小。数值计算中,利用谐波叠加法模拟风荷载作用于该系统,并通过调节MR-TLCD的电压进行实时控制。仿真结果说明了在离复位控制策略下,MR-TLCD用于结构风振控制的合理性和有效性,是理想的半主动控制装置。
Magnetorheological tuned liquid column damper(MR-TLCD) is a new kind of device for vibration control.It has a good performance and can be realized in project easily.A theoretical model of MR-TLCD for suppressing horizontal vibration is developed.The structure with single degree of freedom—MR-TLCD interactive equations are formulated.To start from the dynamic equations of system,the reasonable damping of MR-TLCD is determined according to the off-and-towards-equilibrium control strategy.In numerical calculation,wind load which is simulated by superposition of harmonic acts on the system.The control in time is carried out by adjusting the voltage of MR-TLCD.The simulation results show that the proposed is feasible and effective.Besides,MR-TLCD is an optimal semi-active control device.
Magnetorheological tuned liquid column damper(MR-TLCD) is a new kind of device for vibration control.It has a good performance and can be realized in project easily.A theoretical model of MR-TLCD for suppressing horizontal vibration is developed.The structure with single degree of freedom—MR-TLCD interactive equations are formulated.To start from the dynamic equations of system,the reasonable damping of MR-TLCD is determined according to the off-and-towards-equilibrium control strategy.In numerical calculation,wind load which is simulated by superposition of harmonic acts on the system.The control in time is carried out by adjusting the voltage of MR-TLCD.The simulation results show that the proposed is feasible and effective.Besides,MR-TLCD is an optimal semi-active control device.
引文
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[2]阎石,李宏男.变截面型水箱减振性能研究[J].地震工程与工程振动,1999,19(1):197—201.
[3]Haroun M A,Pires J A.Active orifice control in hy-brid liquid column dampers[A].Proceedings of 1stWorld Conference on Structural Control[C].USA,San Antonio,2000:69—78.
[4]Wang J Y,Ni Y Q,Ko J M,et al.Magneto-rheolog-ical tuned liquid column dampers(MR-TLCDs)for vi-bration mitigation of tall buildings:modeling andanalysis of open-loop control[J].Computers andStructures,2005,83:2 023—2 034.
[5]欧进萍.结构振动控制[M].北京:科学出版社,2003.
[6]杨润林,闫维明,周锡元,等.结构离复位控制的可行性研究[J].振动工程学报,2005,18(4):512—518.
[7]杨润林,闫维明,周锡元,等.半主动U型液力阻尼器的结构振动控制[J].应用力学学报,2003,20(4):108—111.
[8]Spencer Jr B F,Dyke S J,Sain M K,et al.Phe-nomenological model for magnetorheological dampers[J].Journal of Engineering Mechanics,1997,123(3):230—238.
[9]Davenport A G.Gust Loading Factors[M].USA:Chicago Press,1967.
[10]张相庭.结构风工程[M].北京:中国建筑工业出版社,2006.
[11]阎石,郑伟.简谐波叠加法模拟风谱[J].沈阳建筑大学学报,2005,21(1):1—4.
[12]李宏男,李忠献.结构振动与控制[M].北京:中国建筑工业出版社,2005.
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