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TrussSpar平台非线性垂荡-纵摇耦合随机运动分析(英文).docx

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TrussSpar平台非线性垂荡-纵摇耦合随机运动分析(英文) Title:NonlinearCoupledRandomMotionAnalysisofTrussSparPlatform'sHeave-PitchCoupling Abstract: TrussSparplatformsarewidelyusedinoffshoreoilandgasexplorationduetotheirstructuralefficiencyandstability.However,theirdynamicbehaviorunderrandomwaves,especiallytheheave-pitchcouplingeffect,remainsacomplexandnonlinearphenomenon.ThispaperinvestigatesthenonlinearcoupledrandommotionanalysisofaTrussSparplatform'sheave-pitchcoupling,aimingtoprovideinsightsintotheplatform'sbehaviorandcontributetoitsstructuraloptimizationandsafety. 1.Introduction TrussSparplatformshavegainedsignificantattentionindeepwaterenvironmentsduetotheirabilitytowithstandextremeconditions.However,theirresponsecharacteristicsinthepresenceofrandomwavesarenotwellunderstood.Thisstudyaimstoexploretheheave-pitchcouplingeffect,whichcanconsiderablyaffecttheplatform'sstructuralsafetyandstability. 2.DynamicsofTrussSparPlatforms ThissectionprovidesanoverviewofthedynamicresponseofTrussSparplatformsunderrandomwaves.Itcoversthekeyparameters,equationsofmotion,andmethodologyusedtoanalyzetheplatform'sresponse. 3.NonlinearCoupledRandomMotionAnalysis Toinvestigatetheheave-pitchcouplingeffect,anonlinearcoupledrandommotionanalysisisconducted.Theplatform'sresponseissimulatedusingnumericalmethods,suchasthetime-domainapproach,withappropriatemodelingtechniquestocapturenonlinearitiesandcouplingeffects.Theanalysisincludesparameterstudiestoassesstheinfluenceofvariousfactorsonthecouplingeffect,suchaswavecharacteristics,platformgeometry,andstructuralparameters. 4.ResultsandDiscussion Theresultsobtainedfromthenonlinearcoupledrandommotionanalysisarepresentedanddiscussedinthissection.Theanalysisfocusesontheheave-pitchcouplingeffect,highlightingitssignificanceindeterminingtheplatform'sresponse.Theinfluenceofdifferentparametersonthecouplingeffectisalsodiscussed. 5.StructuralOptimizationandSafetyConsiderations Basedonthefindingsoftheanalysis,recommendationsaremadeforthestructuraloptimizationandsafetyconsiderationso