耦合板結構功率流分析研究.pdf

1、上海交通大學博士后學位論文耦合板結構功率流分析研究姓名：王淼申請學位級別：博士后專業(yè)：機械設計及理論指導教師：孟光20090301上海交通大學博士后研究工作報告AbstractTwocoupledplates，whichareconnectedatangles90or180，areusedastheobjectsinthisreportThemainpurposeofthisreportistostudythepowerflowmeth

2、ods，suchastheimpedancepowerflowmethodforthelowfrequencyvibrationanalysis，thestatisticalenergymethodforthehiIgh—frequencyvibrationanalysis，theenergyfmiteelementmethodandtheenergyspectralfiniteelementmethodforthemiddleto—h

3、igh—frequencyvibrationanalysisIntheimpedancepowerflowanalysis，theL—shapedplate／structureissimplifiedtotwofreefreefree—spinnedrectangularplatesWiththehelpofKantorovich’Stheorythetwodimensionalflexuralvibrationproblemisred

4、ucedtoallonedimensionalproblemandthenovelspectralfiniteelementmethodisusedtocalculatetheresponsesofthosetwoplatesThentheinputandtransferpowerspectrumsarederivedwiththetraditionalmobilitytheoryMoreovertheeffectsofinputloc

5、ation，theplatethicknessandthestructuraldampingonthepowerspectrumsareanalyzedInthestatisticalenergyanalysis，experimentsaredesignedandcarriedouttotesttheimportantparameterssuchastheinputpowerthemodaldensitytheinnerlossfact

6、orsandthecoupledlossfactorsTheerrorscausedbytheadditionalmassandstiffnessofthesensorsarediscussed，andthecorrespondingcompensationmethodsareintroducedIntheenergyfiniteelementanalysis，onlytheeffectsoftheflexuralwavesarecon

7、sideredAndtheenergyelementstiffnessequationsarebuiltforaplateelement，whichisfreeattwooppositesidesAndthedetailsofassemblingtheadjacentelementsareproposedThentheenergyfiniteelementmethodisappliedtotwoplatesconnectedatanan

8、gleof180degrees，andtheeffectsoftheexcitationfrequencytheforceampltitudeandtheinputlocationarediscussedIntheenergyspectralfiniteelementanalysis，theeffectsoftheswellwaves，theshearWaVeSandtheflexuralwavesaretakenintoaccount