剛性懸挑平板網格結構風振響應研究

1、北京工業(yè)大學碩士學位論文剛性懸挑平板網格結構風振響應研究姓名：羅敏杰申請學位級別：碩士專業(yè)：結構工程指導教師：張毅剛20070501ABSTRACTABSTRACTTherigidcantileveredflatgirds仕uctL】rehasbeenwidelyappliedforvariousstadiumsbutthetheoryofwind—inducedvibrationandequivalentstaticwindloado

2、fcantilevereds仃ucnlrehasnotbeenwelldevelopedyetThelackofsuchtheorywillmakedesignersalwaysdependontheirsexperiencesSomypaperdesignedaprogrammetosoIvetheproblemofwind—inducedvibrationinfrequencydomainmethodandtimedomainmet

3、hodMyresearchismainlyfocusedonthefollowingaspects：(1)Accurateandhighefficientcomputingmethodsofwind—inducedvibrationresponsesTheflatgirds仃uchlreofrigidcantileveredislikelytoexistthelargecontributionsofhi：gh—ordermodestot

4、hewind—inducedresponseBasedonfrequencydomainmethod，mypaperintroducedthemodecontributionfactorandtheaccumulativemodecontributionfactorthemodecontributionfactorcanbeidentifieda11modescontributabletothewind—inducedresponse，

5、andjudgedthereasonabilityofcomputingmodesMypaperanalysedthecontributionofcouplingtermsbetweensmodestothewind—inducedresponsebased0171theanalysisoftheoryandexample(2)Theresearchoftimedomainanalysismethodtotheflatgirdstruc

6、tureofrigidcantileveredMypaperanalysedthewind—inducedresponseofrigidcantileveredsmlchlreintime—domain，andcomparedwiththeresultofwind—inducedresponseinfrequencydomainmethodMypapertookthemodesuperpositionmethodintothetimed

7、omainanalysismethodfortherigidcantileveredstnlctLlreandsimulatedthepmcedureofgeneralizedloadoftheimpulsivewindintheAuto—Regressivemodel，andcomputedwind—inducedresponse(3)Theresearchofwind—inducedvibrationfactorfortheflat

8、girdstructureofrigidcantileveredCantileveredstructureswereanalyzedwimtheinfluenceofallkindsofparametersusingtheprogrammeAtlast，itweresummarizedtotheseparameterswhicharecrucialtowind—inducedvibrationresponseandfactorofdis

9、placementandthepracticalwindinduceddesignmethodofcantilevereds訂uchlrewasproposedKEYWORDS：rigidcantileveredgirdstructure；windinducedresponse；frequencydomainanalysismethod；modesuperpositionmethod；modecontributionfactor；tim