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LNG船液舱围护系统安装平台结构强度计算分析.docx

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LNG船液舱围护系统安装平台结构强度计算分析 Abstract LiquefiedNaturalGas(LNG)carriersareequippedwithpowerfulenginesthatrequirelargefueltankstopowertheship.Thesefueltanks,alsoknownasthecargotanks,areprotectedbythecargocontainmentsystem,whichhelpskeepthecargoinaliquidstateat-161°C.ThecargocontainmentsystemisthecoreelementoftheLNGcarrierasiteliminatesthesafetyrisksassociatedwithcarryingavolatileliquid.Inthispaper,weanalyzethestructuralstrengthoftheLNGcargotankcontainmentsystemplatformduringinstallation. Introduction ThemostcriticalandchallengingcomponentofanLNGcarrieristhecargotankcontainmentsystem,whichisresponsibleforpreservingandsafelytransportingtheLNGcargo.Thesystemisdesignedwithaseriesofbarrierstoensurethatthecargoremainsinaliquidstateatalltimesduringtransportation.Thesebarriersincludeprimaryandsecondarybarriers,whicharedesignedtopreventanyunwantedspillsorleaks.Theprimarybarrierisametallicmembrane,usuallymadefromstainlesssteel,andthesecondarybarrierisalayerofinsulation,whichprovidesthermalinsulationandhelpsmaintainthedesiredtemperature.Theinsulationmaterialsincludepolystyrenefoam,corkpowder,polyurethanefoamoracombinationofthesematerials. AsthecargocontainmentsystemisincrediblycriticalforthesafetransportationofLNG,supportingstructuresplayavitalroleinensuringthesystem’sintegrityduringinstallation,operation,andmaintenance.Thesestructuresincludetheplatform,whichsupportstheLNGtankanditsinsulation.Thestructuralstrengthoftheplatformiscriticalasitkeepsthecargocontainmentsystemrigidandstable,therebyreducingtheriskofanyfailureorleaks. CalculationofthePlatformStructuralStrength ThestructuralstrengthoftheLNGcargotankcontainmentsystemplatformcanbeevaluatedusingseveralmethods,includingfiniteelementanalysis(FEA),staticloadanalysis,anddynamicresponseanalysis. FEAisanumericalmethodthatanalyzesthestructuralbehaviorofanobjectunderspecificconditionsbydividingitintomanysmallelements.Themethodcanevaluatestressdistribution,deformation,andmaterialfailure. Staticloadanalysisdeterminesthestructure'sresistance