剛性懸挑平板網(wǎng)格結(jié)構(gòu)風(fēng)振響應(yīng)研究

1、北京工業(yè)大學(xué)碩士學(xué)位論文剛性懸挑平板網(wǎng)格結(jié)構(gòu)風(fēng)振響應(yīng)研究姓名：羅敏杰申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)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