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 Wysłany: Nie 3:17, 08 Maj 2011 Temat postu: franklin and marshall sale The cantilever based on |
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The cantilever based on wavelet finite element crack identification
erecentdevelopments. JournalofComputationalandAppliedMathmatics,franklin and marshall sale, 2001; 128:133-18513NandwadaBP, MaitiSK. Detectionofthelocationandsizeofacrackinsteppedcantileverbeamasedonmea-surementsofnaturalfrequencies. JournalofSoundandVibration, 1997; 203 (3) :435-44614ChinchalkarS. Determinationofcracklocationinbeamsusingnaturalfrequencies. JournalofSoundandVibra-tion,ed hardy bikini, 2001; 247 (3) :417-429Identificati0nofCracksinCantileverBeamBasedonWaveletFiniteElementMethodsLiBingChPXuefengHuQiaoHeZhengJia (SchoolofMechanicalEngineering,Tory Burch UK, Xi'anJiaotongUniversityXi'an, 710049) Inthispaper, theblemiStodetermineforwardandinverseproblemsinthedetectionofcracksincantileverbeamarestudied. TheforthreenaturalfrequenciesofthecrackedbeamtOgivethelocationandsizeofthecracknverseproblemistOdeterminethelocationandsizeofthecracktOgivethefirstfewnaturalfrequenciesofthecrackedbeam. Basedonwaveletfiniteelementmethodsthemodelofacrackedcantileverbeamwithrectangularcross-sectionasanexampleisconstructedandthefirstthreenaturalfrequenciesareobtained. Thecrackismodeledasarotationalspring. AfastalgorithmispresentedtOsolvetheinverseproblem. Thenthegraphsofspringstiffnessversuscracklocationareplot-tedforeachnaturalfrequency. Thepointofintersectionofthecurvesgivesthelocationofthecrack. Thenumericalexampleindicatesthatcurrentmethodiseffectiveandaccurate. ThisstudyprovidesanewmethodfortheprognosisanddiagnosisoferacksinstrilcturesKeywords: beam; crack; identification; wavelet; finiteelementmethods Bing male first author ,Franklin Marshall pas cher, doctoral students in December 1976 . Phone : (029) 82667963; E-mail: bli @ mailst. xjtu. edu. cn
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