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船用螺旋桨叶片应力的数值分析（英文）.docx

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船用螺旋桨叶片应力的数值分析（英文） Title:NumericalAnalysisofStressonMarinePropellerBlades Abstract: Marinepropellersarecrucialcomponentsinshippropulsionsystems,convertingtherotationalenergyofanengineintothrust.Sincepropellerbladesareconstantlyexposedtosignificanthydrodynamicforces,theyundergobothfluid-inducedandmechanical-inducedstresses.Thispaperaimstoperformanumericalanalysisofthestressdistributiononmarinepropellerblades,consideringthecomplexfluid-structureinteraction. 1.Introduction Marinepropellersareessentialfortheefficientpropulsionofships.Thedesignandperformanceofpropellersdependonvariousfactors,includingmaterialselection,geometricalparameters,andhydrodynamicforces.Understandingthestressdistributiononpropellerbladesisvitalforensuringtheirstructuralintegrityandperformance.Thispaperaimstoanalyzethenumericalsimulationofstressonmarinepropellerbladesandexplorethefactorsaffectingstressdistribution. 2.ComputationalFluidDynamics(CFD)Modeling Tosimulatethehydrodynamicforcesactingonthepropellerblades,aCFDmodelisutilized.TheCFDmodelincorporatestheNavier-Stokesequationstosolveforfluidflow,takingintoaccounttheReynolds-AveragedNavier-Stokes(RANS)equationsforturbulencemodeling.Thepropellerisrepresentedusingsuitableboundaryconditionsandmeshingtechniques. 3.StructuralAnalysis Thestructuralanalysisisperformedtodeterminethestressdistributiononthepropellerblades.TheFiniteElementMethod(FEM)isemployedtodiscretizethepropellerbladegeometriesintosmallelementsforsolvingthestressequations.Materialproperties,suchaselasticityanddensity,areconsideredtoaccuratelyrepresentthebehaviorofthebladesunderexternalforces. 4.Fluid-StructureInteraction(FSI) Theinteractionbetweenthefluidflowandthepropellerbladesisvitalforanaccurateanalysis.TheFSItechniqueisemployedtocapturetheeffectoffluid-inducedforcesonthestructuralmechanics.Theiterativecouplingbetweenthefluidandstructuredomainsallowsforamorerealisticrepresentationoftheactualoperatingconditions. 5.FactorsAffectingStressDistribution Thestressdistributiononpropellerb