基于實測振動特性識別拉索索力的研究.pdf

1、北京工業(yè)大學(xué)碩士學(xué)位論文基于實測振動特性識別拉索索力的研究姓名：李宗凱申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：張毅剛秦杰20090501ABSTRACTABSTRACTWiththerapidtideofdevelopmenttolargespanandsuperlargespanstructureofthemodemarchitectures，alargenumberofcablesupportedstructuresbeginto

2、emergecontinuouslyAsthemaincomponentssubjectedtoexternalloadsforthiskindofs訊】c鈕lreswhethertheyundertakesufficienttensiondefinitelybecometheessentialfoundationandpresupposition’forthestructures’safetyandreliabilityConsequ

3、entlymeasuringandmonitoringcable’Stensionhasbeenanextremelyimperativetaskinthefieldofdetectionandmonitoringofcable—supportedstrucnlresNowadays，itisthecable’Stensionidentificationmethodbasedonmeasuringcable’Sdynamiccharac

4、teristicsthatiswidelyregardedasoneofthemosthighefficient，economicandconvenientmethodsHowevertherearesomeweakpointsinpracticalapplicationAsforthis，basedondiscussingthepracticalapplicationofthemethod，thedissertationgainsso

5、mepositiveconclusionsinresearchThemainworkandachievementsarelistedasfollows：(1)Takingthefullscaletestofmeasuringsteelstrand’Sbendingstiffnessofnominaldiameter152mmasatypicalexample；thedissertationpresentsaneffectivemetho

6、dforcable’Ssectionsimplificationthroughmeasuringcable’Srealbendingstiffnesswhencable’sbendingstiffnessneedstobeconsideredincomputer’Smodelingandculculating(2)Withrespecttotheformulaoftautstringtheorytheapplicablerangeoft

7、heformulafornominaldiameter152mmwasconcludedbyaseriesoffiniteelementcalculationusingANSYSunderdifferentcable’StensionconditionsTherequestofminimallengthdiameterratiowasputforwardaccordingtodifferentloadconditionswhenusin

8、gtheformula(3)Amethodforcable’Stensionevaluationbasedonmonitoringthehalfwavelengthofhigherordermodalsandthecorrespondingnaturalfrequenciesofcables’vibrationWaspresentedbythisdissertationFurthermore，inordertoverifythemeth

9、od’Seffectiveness，afiniteelementanalysisusingANSYSandafullscaletestwereconductedThefeasibilityandapplicabilityofthemethodweredemonstratedbytheanalysisandcomparisonofthetestforsteelstrandofnominal152mmandthefiniteelementc