一種新型形狀記憶合金超彈性阻尼器的理論與試驗研究.pdf

1、東南大學(xué)碩士學(xué)位論文一種新型形狀記憶合金超彈性阻尼器的理論與試驗研究姓名：肖爾田申請學(xué)位級別：碩士專業(yè)：工程力學(xué)指導(dǎo)教師：韓玉林20040301——變塑查堂堡圭蘭垡墮_文Abstractstructuralvibrationenergydissipationisakindofstructuralcontroltechnologywhichemploysenergy—dissipationdevicesinstalledinproperl

2、ocationsofthestructuretodissipatepartofstructuralvibrationenergyunderearthquakeandwindsoasteducethestructuralvibrationresponseShapememoryalloy(SMA)isanidealmaterialtodissipatevibrationenergybecauseofitspropertiesofshapem

3、emoryeffect(SME)，superelasticityeffectanddampingeffectSotheshapememoryalloydamperwhichisbasedontheseproperties，isagoodkindofenergydissipationdeviceItcanreducetheseismicandwind—vibrationresponseoftheengineeringstructurese

4、ffectivelySothestudiesontheshapememoryalloydamperarevaluableintheoryandpracticeThecurrentsituationsofresearchesandapplicationsofshapememoryalloydamperarebrieflyreviewedinthisthesisfirstlyThenanewtypeofdamperdevicebasedon

5、shapememoryalloy(SMA)wiresisdevelopedforstructuralcontrolimplementationBasedonthisnewtypedampersomenewengineeringapplicationsinconstructionbuildingsandlong—spanbridgeswiththisdamperareproposedThenthetheoreticandexperimen

6、talstudyofthisnewtypeofdampertechnologyforstructuralvibrationenergydissipationisperformedtoverifythevibrationenergydissipationabilityofthenewtypeofSMAdamperFinallybasedontheexperimentalresultsfiniteelementmethodisadopted

7、tosimulatetheearthquakeresponseoftheframemodeIcontroileduncontrolledbySMAdamperThemaincontentsandresultsareasfoIlows1BasedonthepropertiesoftheSMA，anewtypeofdamperdevicebasedonshapememoryalloyfSMA)wireslsdevelopedforstruc

8、turaIcentrelimplementationThiskindofSMAdampercansupplytensiondamping，compressiondamping，torsiondampingandbendingdampingatthesametime2Basedonthisnewtypedampersomenewengineeringapplicationsinconstructionbuildingsandlongspa

9、nbridgeswiththisdamperareproposedItcanbeusedinmanykindsofstructuresandInstailedeasilyandhaveseveraladvantagesthatotherdampersdon’thave，3Thetheoreticstudyonsuchdamperisperformedincludingtheresearchonfundamentaidampingprin

10、cipleofthedamperandmechanicsdampinganalysisofsuchdevelopedreducedscaledamperThevariousaffectingfactorstotheworkingperformanceofSMAdamperarediscussedTheformulaoftheoutputdampingforceanddisplacementisgottenwhenthedamperist

11、ensedorcompressed，rotatedandbent4ThedynamicaIexperimentofsuchreduced—scaledamperjsperformedtoverifythedampinganalysisresultsandthevibrationenergydissipationabilityofthenewtypeofSMAdamperItjsfoundthattheexperimentalresult

12、sareingoodagreementwiththetheoreticvalues5FromtheexperimentalrestoringforcecurvethedampingcoefficientandstiffnessofdamperarecalculatedBasedontheseparametersofthedamperfiniteelementmethodIsadoptedtosimulatefheearthquakere

13、sponseoftheframemodel，controlledanduncontrolledbySMAdampersThenumericaIresultsiIlustratethattheearthquakeresponsedisplacementoftheframemodeIisreducedgreatlyandItsvibrationdecayrateisincreasedeffectivelyafterthedevelopedS

14、MAdampersarefixedinitSuchtypeofSMAdamperisagooddevicetodissipateenergyandteducethevibrationofthestructuresKeywords：Shapememoryalloystructuralcontrolsmartmaterialdamperearthquakedynamicalpropertyrestoringforcemodelhistory