毕业论文英文答辩(CRANE)

TheDesignoftheOverallandATypeofDoorFrameof60TonsGantryCrane,speaker：xxx,TheMainContents,thebasisofthepapertheresearchcontentstheresearchmethodssummaryandoutlook,TheBasisofThePaper,1.TheDevelopmentofCraneInrecentyears,theroleoftheliftingtransportationmachineryisbeyondthescopeofauxiliaryequipmentduetothecontinuousdevelopmentofindustrialtechnology.Andthenthismachineryhasbeendirectlyusedintheproductionprocess.Ithasbeenthemainpartsoftheassemblyline.,Tendency,2.TheshortageofthedomesticcranesTheperformanceofproductsanddevelopmentabilityisweak;Thelevelofmanufacturingtechnologyislow;Theproductdetectionlevelisnothigh;Thefittingssupplyisinsufficientandthequalityispoor;Theupdateofproducttechnologystandardislagandislackofexecutiveforce.,TheResearchContents,TheDesignoftheOverallandATypeofDoorFrameof60TonsGantryCrane.Determiningtheoveralldesign,includingthedoorheight,themaingirdersspan,gatelegtypeandbasicsize,etc.Calculatingthestrengthofcomponentsorstructureofthecrane,thencheckingthestrengthandstability.,theresearchmethods,1.Thedesignparameters,2.TheTypeofLoad,3ConfirmingAPreliminarySchemeThedoorframe:typeAlegs,singlebox,doublebeamsstructure.TheheightofmaingirderisH=15m,thespanisL=30m.Thehingetypeoflegsistworigidlegs.,4.DesigntheDimensions,Thedeterminationofmaingirdergeometrysize.,GeometricFeaturesofGirders,Areas:SL=48976mm2Momentofinertia:Ix=Iy=Sectionmodulus：Wx=Wy=,Thedeterminationofcross-sectiongeometrysizeofdoorlegs.,GeometricFeaturesofDoorLegs,Areas:ST=60576mm2Momentofinertia:Ix=Iy=Sctionmodulus：Wx=Wy=,4.CaulculateLoad,WindLoads,5.CaulculatetheInternalForceofGirder,Theinternalforcediagramsofgirder,Theverticalin-planebendingmomentofgirder,Thehorizontalin-planebendingmomentofgirder,6.CheckingtheStrengthofGirder,Themaximumvalueofbendingstressis:(1)Whilethelittlevehicleisatthemidspan.(2)Whileatthecantileve,So,theselectedsizemeetsthestrengthdemandofgirder.,7.CaulculatetheInternalForceofDoorLegs.,Whilethelittlevehicleislocatedinthethemaingirderacross.Whileatthecantilever.,CheckingtheStrengthofDoorLegs.,Themaximumvalueofthedoorlegsis:(whilethelittlevehicleislocatedinthemaingirderacross),So,theselectedsizemeetsthestrengthdemandofdoorlegs.,SummaryandOutlook,Thedesignofthemainbeamsanddoorsleghasbeenillustratedindetailinthispaper.Inaccordancewithlimitstresscalculationmethodandallowablestresscalculationmethod,theauthorhascheckedthestrengthofthemainbeamsanddoorsleg.Intheend,theauthorhasdeterminedthefinaldecisionoftheappropriatesizeinthemainbeamanddoorslegflatplane.,Anewstageofthedesignofthecrane,ElectronicComputerTechnologyOptimizationofEngineeringValueEngineeringReliabilityEngineeringCreatingEngineeringMan-mach