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 Posted: Sun 3:25, 08 May 2011 Post subject: Óculos Oakley The cantilever based on wavelet fini |
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,[link widoczny dla zalogowanych]
The cantilever based on wavelet finite element crack identification
erecentdevelopments. JournalofComputationalandAppliedMathmatics, 2001; 128:133-18513NandwadaBP, MaitiSK. Detectionofthelocationandsizeofacrackinsteppedcantileverbeamasedonmea-surementsofnaturalfrequencies. JournalofSoundandVibration,[link widoczny dla zalogowanych], 1997; 203 (3) :435-44614ChinchalkarS. Determinationofcracklocationinbeamsusingnaturalfrequencies. JournalofSoundandVibra-tion,[link widoczny dla zalogowanych], 2001; 247 (3) :417-429Identificati0nofCracksinCantileverBeamBasedonWaveletFiniteElementMethodsLiBingChPXuefengHuQiaoHeZhengJia (SchoolofMechanicalEngineering, Xi'anJiaotongUniversityXi'an,[link widoczny dla zalogowanych], 710049) Inthispaper, theblemiStodetermineforwardandinverseproblemsinthedetectionofcracksincantileverbeamarestudied. TheforthreenaturalfrequenciesofthecrackedbeamtOgivethelocationandsizeofthecracknverseproblemistOdeterminethelocationandsizeofthecracktOgivethefirstfewnaturalfrequenciesofthecrackedbeam. Basedonwaveletfiniteelementmethodsthemodelofacrackedcantileverbeamwithrectangularcross-sectionasanexampleisconstructedandthefirstthreenaturalfrequenciesareobtained. Thecrackismodeledasarotationalspring. AfastalgorithmispresentedtOsolvetheinverseproblem. Thenthegraphsofspringstiffnessversuscracklocationareplot-tedforeachnaturalfrequency. Thepointofintersectionofthecurvesgivesthelocationofthecrack. Thenumericalexampleindicatesthatcurrentmethodiseffectiveandaccurate. ThisstudyprovidesanewmethodfortheprognosisanddiagnosisoferacksinstrilcturesKeywords: beam; crack; identification; wavelet; finiteelementmethods Bing male first author ,[link widoczny dla zalogowanych], doctoral students in December 1976 . Phone : (029) 82667963; E-mail: bli @ mailst. xjtu. edu. cn
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