海洋平台主结构节点裂纹修复分析研究(英文)-豆柴文库

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海洋平台主结构节点裂纹修复分析研究(英文)
ResearchontheAnalysisandRepairofCracksinMainStructuralNodesofOffshorePlatforms
1.Introduction
Offshoreplatformsareimportantinfrastructureforoilandgasexplorationandproductionintheocean.Themainstructuralnodesofoffshoreplatformsbeartheweightoftheplatformandwithstandtheexternalforcesofseawater,wind,andwaves.However,duetolong-termexposuretoharshmarineenvironments,themainstructuralnodesofoffshoreplatformsmaysufferfromfatiguedamage,corrosion,andotherfactors,leadingtocracksandevenstructuralfailure,whichwillseriouslythreatenthesafetyoftheplatform.Therefore,itisnecessarytoanalyzeandrepairthecracksinthemainstructuralnodesofoffshoreplatforms.
2.AnalysisofCrackMechanism
Thecracksinthemainstructuralnodesofoffshoreplatformsaremainlycausedbyfatigueandcorrosion.Fatiguecracksarecausedbyrepeatedcyclicloadsonthenodesoveraperiodoftime.Corrosioncracksarecausedbyelectrochemicalreactionsbetweenthemetalsurfaceofthenodesandseawater,whichresultsinmetallossandstructuraldamage.Thefactorsinfluencingtheformationofcracksincludematerialproperties,loadingconditions,andenvironmentalconditions.
3.RepairMethods
Therepairmethodsforcracksinthemainstructuralnodesofoffshoreplatformsincludewelding,compositeoverlays,boltedconnections,andstrengtheningwithadditionalmaterials.Weldingisacommonlyusedmethodforrepairingcracksinthenodes,anditcaneffectivelyrestorethefatiguestrengthofthestructure.Compositeoverlaysareaneffectivemethodforrepairingcorrosiondamage,andtheycanimprovethecorrosionresistanceofthestructure.Boltedconnectionsareaflexiblerepairmethod,andtheycanbeusedtoreplacedamagedcomponentsinthenodes.Strengtheningwithadditionalmaterialscanbeusedtoimprovethefatiguestrengthandcorrosionresistanceofthenodes,anditisapplicabletorepairlarge-scaledamageinthenodes.
4.CaseAnalysis
Takingacrackinthemainstructuralnodeofanoffshoreplatformasanexample,thispaperanalyzesthecausesofthecrack,thedamageextent,andtherepairmeasures.Thecrackiscausedbycorrosiondamage,andthedamageextentissevere.Weldingisusedtorepair