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大型浮体水弹性作用的频域分析
Title:FrequencyDomainAnalysisoftheHydroelasticEffectsonLargeFloatingStructures
Abstract:
Largefloatingstructuresaresusceptibletohydroelasticeffects,whichrefertothedynamicresponseofthestructurearisingfromtheinteractionbetweenthestructureandthesurroundingwater.Thispaperaimstoprovideacomprehensiveunderstandingofthefrequencydomainanalysisofhydroelasticeffectsonlargefloatingstructures.
Introduction:
Largefloatingstructures,suchasoffshoreplatforms,floatingbridges,andfloatingwindturbines,aresubjecttovariousenvironmentalloads,includingwaves,winds,andcurrents.Theseenvironmentalloadsinducehydrodynamicforcesandmomentumsthatcanleadtosignificantstructuralresponse.Additionally,theflexibilityofthestructureitselffurtherexacerbatesthedynamicresponseduetoitsinteractionwiththewater.Itiscrucialtoevaluateandunderstandthehydroelasticeffectsonlargefloatingstructurestoensuretheirsafety,operationalefficiency,anddesignoptimization.
Methodology:
Frequencydomainanalysisisawidelyusedapproachtoanalyzethehydroelasticeffectsonlargefloatingstructures.Themethodologyinvolvesdecomposingthestructuralresponseandtheenvironmentalloadsintofrequencycomponentsanddeterminingthetransferfunctionbetweenthem.Thetransferfunctionsprovidevaluableinformationabouttheamplification,damping,andphaseshiftingoftheresponse.
1.HydrodynamicAnalysis:
Thefirststepinthefrequencydomainanalysisistoobtainthehydrodynamicpropertiesofthestructure.Thisincludesderivingthehydrodynamiccoefficients,suchasaddedmass,radiationdamping,andwaveexcitingforces.Thesecoefficientsareobtainedthroughpotentialflowtheory,boundaryelementmethods,orcomputationalfluiddynamicssimulations.
2.StructuralAnalysis:
Thenextstepistomodelthestructuralresponseofthefloatingstructure.Thestructuralmodelincludesthestiffness,mass,anddampingpropertiesofthestructure.Itisessentialtoaccuratelyrepresentthedynamicbehaviorofeachcomponentofthestructure,suchaspontoons,cables,andmooringsystems.
3.FrequencyDomainAnalysis:
Thefrequencydomainanalysisinvolvescalculatingth