顺风激励下高层建筑多重调谐质量阻尼器振动控制的参数研究(英文)

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1、第20卷第2期华　中　科　技　大　学　学　报(城市科学版)Vol.20No.22003年6月　J.ofHUST.(UrbanScienceEdition)Jun.2003ParametricAnalysisofMultipleTunedMassDampersforAttenuatingUndesirableAlong-windResponsesofTallBuildings1LIChun2xiang(1.SchoolofCivilEng.&Mechanics,ShanghaiJiaoTongUniv.,Shanghai200030,China)Abstract:Themai

2、nobjectiveofthispaperistoperformtheparametricstudiesofthemultipletunedmassdampers(MTMD)forattenuatingundesirablealong2winddisplacementandaccelerationresponsesofstructureswithresortingtothepseudo2excitationapproachinthefrequencydomain.TheMTMDiskepttohavetheidenticalstiffnessanddampingbutune

3、qualmass,thusmoreeasilymanufactured.MinimizationoftheminimumvaluesofthemaximumdisplacementandaccelerationdynamicmagnificationfactorsofthestructureisusedtoseekfortheoptimumparametersoftheMTMD.Minimizationoftheminimumvaluesofthemaximumdisplacementandaccelerationdynamicmagnificationfactors,re

4、spectively,nondimensionalizedbythemaximumdisplacementandaccelerationdynamicmagnificationfactorsofthestructurewithouttheMTMD,isadoptedastheindexmeasuringtheeffectivenessoftheMTMD.EvaluationisconductedonthestrokedisplacementoftheMTMDthroughassessingthemaximumdisplacementdynamicmagnificationf

5、actorofeveryTMDintheMTMD.TheresultsindicatethatboththedeviationofthecontrollednaturalfrequencyandthevariationinwindloadinghavenoinfluenceupontheoptimumparametersandeffectivenessoftheMTMD.However,itisworthnotingthatthestrokedisplacementoftheMTMDissensitivetobothofthem,inparticular,totheform

6、er.ThestrokedisplacementoftheMTMDisaveryimportantspecificationthatdecidescosts.Consequently,alargedeviationhigherthanthecontrollednaturalfrequencyisnotpermitted.Additionally,thetotalnumberwithintherangefromn=7ton=15isbeneficialwhentheMTMDisusedtocontrolthealong2windresponsesoftallbuildings

7、.Keywords:structuralcontrol;multipletunedmassdampers(MTMD);wind;parametricstudiesCLCnumber:TU352.1Documentcode:AArticleID:1000-5730(2003)02-0006-10ItisknownthattheperformanceofasingleeffectiveinthemitigationoftheoscillationsofTMDissensitivetothefrequencyratiob