磁流变式调谐液柱阻尼器对结构风致抖振控制研究
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摘要
磁流变式调谐液柱阻尼器(MR-TLCD)是由调谐液柱阻尼器(TLCD)和磁流变液阻尼器(MRD)组成的新型半主动控制装置。建立了含有半主动控制力项的MR-TLCD力学模型以及MR-TLCD与单自由结构耦合运动方程,等效线性化处理了MR-TLCD力学方程中的非线性阻尼项。采用谱分析方法研究了MR-TLCD对单自由结构风致抖振情况下控制效果。研究结果表明,在质量比和频率比一定的情况下,MR-TLCD能够通过只改变外接电源进而改变MR-TLCD阻尼力即可实现良好的优化减振性能。且加速度控制效果优于位移控制效果。
Magnetorheological tuned liquid column damper(MR-TLCD) is a promising device for vibration control,which consists of tuned liquid column damper(TLCD) and Magnetorheological damper(MRD) as its name implies.The mechanical model of MR-TLCD with the semi-active control force and the equations of motion for the coupled system of MR-TLCD-structure were formulated in this paper and its nonlinear damping force was approximated by means of the equivalent damping linearization in solution.Wind-induced buffeting response of a single-degree-of-freedom structure with MR-TLCD was obtained by spectrum analysis method.For a fixed mass ratio and frequency ratio,the MR-TLCD was shown to be capable of achieving favorable vibration mitigation capability through adjusting damping force of MRTLCD by external electrical current.The control performance of the acceleration was better than that of displacement.
Magnetorheological tuned liquid column damper(MR-TLCD) is a promising device for vibration control,which consists of tuned liquid column damper(TLCD) and Magnetorheological damper(MRD) as its name implies.The mechanical model of MR-TLCD with the semi-active control force and the equations of motion for the coupled system of MR-TLCD-structure were formulated in this paper and its nonlinear damping force was approximated by means of the equivalent damping linearization in solution.Wind-induced buffeting response of a single-degree-of-freedom structure with MR-TLCD was obtained by spectrum analysis method.For a fixed mass ratio and frequency ratio,the MR-TLCD was shown to be capable of achieving favorable vibration mitigation capability through adjusting damping force of MRTLCD by external electrical current.The control performance of the acceleration was better than that of displacement.
引文
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[2]Cao H,Kwok K S C,Samali B.Characteristics ofmultiple tuned liquid column dampers in suppressingstructural vibration[J].Engineering Structure,1999,21:316—331.
[3]Balendra T,Wang C M,Cheong H F.Effectivenessof tuned liquid column damper for vibration control oftowers[J].Engng.Struct.,1995,17(9):668—675.
[4]Chang C C,Hsu C T.Control performance of liquidcolumn vibration absorbers[J].EngineeringStructure,1998,20(7):580—586.
[5]Hochrainer M J.Tuned liquid column damper forstructural control[J].Acta Mechanica,2005,175:57—76.
[6]Frandsen J B.Numerical predictions of tuned liquidtank structural systems[J].J of Fluids andStructures,2005,20:309—329.
[7]Swaroop K,Yalla S M,Ahsan Kareem M.Semiactivetuned liquid column dampers:experimental study[J].J of Structure Engineering ASCE,2003,129(7):960—971.
[8]Fortner B.Water tanks damp motion in Vancouverhigh-rise[J].Civil Engineering ASCE,2001,71(6):18.
[9]阎石,李宏男,林皋.可调频调液柱型阻尼器振动控制参数研究[J].地震工程与工程振动,1998,18(4)96—102.
[10]李宏男,霍林生.调液阻尼器对结构扭转耦联振动控制的优化设计[J].计算力学学报,2005,22(2):129—134.
[11]周云,徐龙河,李忠献.磁流体阻尼器半主动控制结构的地震反应分析[J].土木工程学报,2001,34(5):10—14.
[12]瞿伟廉.MR阻尼器对高耸结构风致反应的智能控制[J].建筑科学与工程学报,2006,23(1):10—16.
[13]王修勇,陈政清,倪一清,等.斜拉桥拉索磁流变阻尼器减振技术研究[J].中国公路学报,2003,16(2):52—56.
[14]Wang J Y,Ni Y Q,Ko J M,et al.Magneto-rheologicaltuned liquid column dampers(MR-TLCDs)forvibration mitigation of tall buildings:modeling andanalysis of open-loop control[J].Computers andStructures,2005,83:2 023—2 034.
[15]Wu J Ch,Shib M H,Lin Y Y,et al.Design guidelinefor tuned liquid column damper for sturcutresresponding to wind[J].Engineering Structure,2005,27(13):1 893—1 905.
[16]Chang C C,Hsu C T.Control performance of liquidcolumn vibration absorbs[J].EngineeringStructures,1998,20(8):580—586.
[17]Tullis J P.Hydraulic of Pipeline[M].Jonh Wiley.New York,1989.
[18]侯友夫.往复矩形密封的理论分析和实验研究[J].中国矿业大学学报,1997,26(1):89-93.
[19]Dyke S J,Spencer Jr,Sa M K,et al.Modeling andcontrol of magnetorhcological dampers for seismicresponse reduction[J].Smart Mater.Struct.,1996,5:565—575.
[20]欧进萍,关新春.磁流变耗能器及其性能[J].地震工程与工程振动,1998,18(3):74—81.
[21]Nicos Makrisy,Scott A Burtonz,Douglas P Taylor.Electrorheological damper with annular ducts forseismic protection applications[J].Smart Mater.Struct.,1996,5:551—564.
[22]Victor L Streeter E Benjamin Wylie,et al.FluidMechanics[M].9th ed.北京:清华大学出版社,2003.
[23]Hitcheock P A,Kwok K C S,Watkins R D.Characteristics of liquid column vibration absorbers(LCVA)-[J].Engineering Structures,1997,19(2):126—134.
[24]Davenport A G.Gust Loading Factors[R].ACSE,ST3,1967.
[25]张相庭.结构风工程[M].北京:中国建筑工业出版社,2006.
[26]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
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