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1、E行器结构公式Aircraftstructure1.therelationbetweensafetyfactorandoverloadfactor?Safetyfactor:f=Fd/nGoverloadfactor:n=Rbi/GThesafetyfactordecreaseswiththeincreaseofoverloadfactor,whereasonthecontrary,itincreaseswiththeoverloadfactordecreasing2.basicrequirementsforstructuraldesign?Pn
2、eumaticrequirements,qualityrequirements,useandmaintenaneerequirements,reliabilityrequirements,processrequirements,andeconomicrequirementsThefunctionof3.wings:toproducelift,tobalancetheweightofanaircraftormissile4.mainexternalload?1pneumatic2wingstructuremassforce3concentrated
3、forcesfromothercomponentsandexternalstoresThemainforcecomponentandfunctionofthe5.wingplane?Skin:theformofastreamlinedairfoilStringer:skinplaysasupportingroleWingbeam:theedgebarbearsthepullthroughforcecausedbythebendingmomentM.ThewebissubjectedtoshearQandshearflowinducedbytorq
4、ueMtVerticalwall:longitudinalwallgenerallycannotbearthebendingmoment,mainlyusedtobearandtransfershear,andwiththeskinandotherwebsformaclosed,togethertobearthewingsurfacetorsioncausedbyshearflowRib:maintaintheairfoilshape,andtheskinofthelocalgasloadanddynamicloadonthestringersp
5、assedtothesparandskin.Themainstructureofthe6.wing?Themainstructureofthewingsurfaceistheformofthemainbearingsysteminthestructure・Thetypicalforceformsofthewingsurfaceincludetheskinskeletontype,theintegralpaneltypeandthesandwichstructure・7.beamstructure,Shiyisurfacestructureofth
6、emechanicalcharacteristicsandadvantagesanddisadvantages?Features:theskinisthin,thelongitudinalbeamHenqiang,longitudinalstringersissmallandweak,sometimeswithribsintersectingoff,Thesectionareaofthebeamedgestripismuchlargerthanthatofthelongtruss,anditcanbeapproximatelyconsidered
7、thatmostorallofthebendingmomentofthewingsurfaceisbornebythebeamedgestripTheutilitymodelhastheadvantagesofsimplestructure,lessbuttjointandsimpleconnection,andissuitableforcentralizedconnectionDisadvantages:pooraerodynamicperformance,pooroverallmechanicalperformanceandlowsurviv
8、ability7.・Thestructuralfeatures,stresscharacteristics,advantagesandd
