結(jié)構(gòu)阻尼時域識別方法的研究.pdf

1、武漢理工大學(xué)碩士學(xué)位論文結(jié)構(gòu)阻尼時域識別方法的研究姓名：楊劍輝申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：李書進20071101武漢理工大學(xué)碩士學(xué)位論文AbstractVibrationModalanalysisandparametersidentifyisoneactivityembranchmentofvibrationengineeringItisthefoundationofstructure’sdynamicdesigning，

2、decreaseandeliminatesvibrationandcontrolvibrationVibrationModalanalysisandparametersidentifyisananalysismethodwhichisusedin“athwartquestion’’intheStructureDynamicsItisusedtosolvethestructures’problemsbyassociativeexperim

3、entswiththeoreticanalysisSofaritisabroadappliedintheprojectdomainanditisbecomingimportantshifttosolvestructure’problemsThegoalofModalanalysisistoidentifymodalparameterstoanalyzesystemofstructures’vibrationcharacteristicf

4、aultdiagnosisandforecastinordertoprovide舀sttooptimumdesigningStructuresModalParametersincludemass，rigiditydampingwecanidentifythembymodalanalysisextractiontechniquesBecauseitsthemosthardtobeidentifiedandtheproblemsbrough

5、tbydampingareimportantonflamedesignortooptimizestructuredesignManyresearchershavedevotedtheirworktothedevelopmentofmodalanalysisextractiontechniquesinordertoobtainmorereliableidentificationofthemodalparametersThereareman

6、ydampingidentificationmethods，buteachonehasdifferentmeritanddefectInordertofindwhichoneisthemostreliablemethodwithrespecttocertaincharacteristics，thisthesisfocusonhowtoidentifystructure’sdampingintimedomainThefollowingwo

7、rkshavebeendoneinthisthesis：1Fourmodalanalysismethods———_theLSCEMethodtheIbrahimTimeDomainMethod，theTimeDomainCollectivityModalParameterMethodsandtheRationalFractionPolynomialMethodarecollectedtobeinvestigateinthethesis2

8、Usingthefourmethordstoidentifythemodaldampingwithappropriatedynamicsmodalandprotractrelevantplots3Comparetheresultsidentifiedbythefourmethodsandinvestigatehowthedampingratioestimationisaffectedwithrespecttoeachmethodindi