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1、DynamicResponseofMarineGearunderExternalImpactLoad1,a21ChengLi,ChanghuaQiu,NianliLu1SchoolofMechatronicsEngineering,HarbinInstituteofTechnology,Harbin150001,China2CollegeofMechanicalandElectrical,HarbinEngineeringUniversity,Harbin150001,Chinaacheng712@gmail.comKeywords:gearbox,contac
2、tstress,dynamicresponse,finiteelementmethod.Abstract.Inordertodeterminetheanti-shockperformanceofmarinegear,dynamicmodelofgear-rotor-bearingsystemunderexternalloadisestablished.OnthebaseofHertzcontacttheory,themathematicalmodelofmaximumstressresponseofthegeartoothcontactareaisdevelop
3、edandthetypicalshockspectrumwastransferredtodoublepeaksandtrianglewavetosimulatetheprocessofbaseexcitation.Bysimulatingdifferentimpactpulsewidthandaccelerationpeakvalue,theprogrammingresultisingoodagreementwithFinite-Elementsimulation.Thestudyconsidersthatthebearingoilfilmcanabsorbim
4、pactingloadandInformationonstressresponseofgearcontactareaunderexternalloadcouldofferreferencesforthedesignofmarinegearboxtoenhancetheresistancetounderwatershockdamage.IntroductionGearboxisthemaincomponentofthemarinetransmissionsystem.Theloadingcaseofgearcontactareacouldincludeoperat
5、ingstressandexternalimpactstresscausedbyunderwaterexplosion.Ahighlevelimpactloadmaybringsomefailuressuchastoothfracture,toothsurfacedeformationandthedirectconsequencesofthesefailuresislossofmobility.Sotheresearchondynamicresponseofmarinegearunderexternalimpactloadcouldevaluatetheanti
6、-shockcapabilityofgearbox.Theaccuratetheoreticalresearchondynamicresponseofgearcontactareaisdifficulttoexecuteduetoitscomplexity.Mostpreviousstudiesareaboutgearmeshingprocessandtoothcontactcharacteristic.LinTengjiaopresentedamixedfiniteelementformulafor3Ddynamiccontactproblemsandthei
7、mpactcharacteristicsweresimulatedwheneitherthesuddenloadappliedtodrivengearorthemeshing-inimpacttakenplace[1].In1989,theAmericanMilitaryStandardMIL-S901wasissued.Thisspecificationcoversshocktestingrequirementsforshipboardmachinery,equipment,systems,andstructures.Thepurposeoftheserequ
8、irementsisto
