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1、FatigueAssessmentofComplexWeldedSteelStructuresJohanMartinssonFatigueAssessmentofComplexWeldedSteelStructuresJohanMartinssonDivisionofLightweightStructuresDepartmentAeronauticalandVehicleEngineeringRoyalInstituteofTechnologySE-10044StockholmTRITA-AVE2005:02ISBN91-2
2、783-968-6FatigueAssessmentofComplexWeldedSteelStructuresiPREFACETheworkinthisdoctoralthesishasbeencarriedoutattheDivisionofLightweightStructuresattheDepartmentofAeronauticalandVehicleEngineeringattheRoyalInstituteofTechnologybetweenFebruary2000andOctober2004.Thewor
3、kdoneinthisthesisisapartoftheNordicR&DprojectFE-Design2000-ImprovedUsageofHighStrengthSteelbyanEffectiveFEA(FiniteElementAnalysis)basedDesignMethodologyforFatigueLoadedComplexWeldedStructures.Theproject,whichinvolvedcooperationof24NordicorganisationsfromSweden,Finl
4、and,Denmark,IcelandandNorway,hadtheaimofimprovinglead-time,accuracyandmaterialutilisationoffatigueloadedcomplexweldedstructuressuchasconstructionmachinery,busses,forestmachines,robots,cranesandshipstructures.Theconsortiumalsoincludedthreesteelsuppliers,fourengineer
5、ingconsultingfirms,threeresearchorganisationsandfouruniversities.SomeoftheworkhasalsoregularlybeenpresentedanddiscussedwithinCommissionXIII(Fatigueofweldedcomponents)inInternationalInstituteofWelding(IIW)duringdifferentAnnualAssemblies.Theworkinthisthesishasmainlyb
6、eenfundedbyVolvoConstructionEquipment(VolvoCE),SSAB,TheSwedishVehicleResearchProgram(PFF)andtheNordicInnovationCentre(NiCe).Firstofall,IwouldliketoexpressmysincerethankstomyadvisorProf.JackSamuelsson(VolvoCEandKTH)forinitiatingandsupervisingthework.SpecialthankstoG
7、ertPetterson,BertilJonsson,GöranKronmaratVolvoArticulatedHaulers,MagnusByggneviandStefanForsbergatVolvoWheelLoadersandMatsGustafssonatSSAB,whomIhavebeenworkingwithduringtheresearchproject.IwouldalsoliketothankthepeoplewithintheDivisionofLightweightStructures.Specia
8、lacknowledgementsarealsoduetoBjörnPalmbergandDr.GengShengatSwedishDefenceResearchAgency(FOI)andDr.DanHolmatAlfgamOptimisationABfordiscussionsabou
