Structural Analysis of a Contra Rotating Propeller by using Finite Element Method (FEM)

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Ch. Suryanarayana
M. Nageswara Rao
P. Nooka Raju

Abstract

Inordertoassessthestaticanddynamic responseofanAFTpropellerofContrarotatingpropeller(CRP)forentirerangeofitsoperation,ananalysiswascarriedoutbyFEM(FiniteElementMethod)andvalidatedbyanalyticalapproach.FromtheStaticanalysisitisfoundthatthestressanddeflectionarewellwithinsafelimits.Theelasticdeformationaresosmall,thattheywon'taffecthydrodynamicloaddistribution..ThedynamicanalysesofCRPindicatethatitissafeinitsentire rangeofoperationasfarasphenomenonofResonanceisconcerned.Alsoitwasobservedthatmaximumharmonicresponseofthepropellerontheapplicationofdynamicloadingisfarlesserthanitsfailurelimit withinspecifiedoperatingrange.

Inordertoassessthestaticanddynamic responseofanAFTpropellerofContrarotatingpropeller(CRP)forentirerangeofitsoperation,ananalysiswascarriedoutbyFEM(FiniteElementMethod)andvalidatedbyanalyticalapproach.FromtheStaticanalysisitisfoundthatthestressanddeflectionarewellwithinsafelimits.Theelasticdeformationaresosmall,thattheywon'taffecthydrodynamicloaddistribution..ThedynamicanalysesofCRPindicatethatitissafeinitsentire rangeofoperationasfarasphenomenonofResonanceisconcerned.Alsoitwasobservedthatmaximumharmonicresponseofthepropellerontheapplicationofdynamicloadingisfarlesserthanitsfailurelimit withinspecifiedoperatingrange.

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