深海钢悬链式立管管土相互作用及截断模型试验.docx

深海钢悬链式立管管土相互作用及截断模型试验
Title:ExperimentalInvestigationonSoil-PipeInteractionandCutoffModelsforDeepwaterSteelCatenaryRisers
Abstract:
Deepwatersteelcatenaryrisers(SCRs)playacrucialroleintheexplorationanddevelopmentofoffshoreoilandgasfields.UnderstandingthebehaviorofSCRsundervariousloadingconditions,includingtheirinteractionwiththesurroundingsoil,isessentialfordesigningreliableandcost-effectiverisersystems.Thispaperpresentsacomprehensiveexperimentalinvestigationonthesoil-pipeinteractionandcutoffmodelsfordeepwatersteelcatenaryrisers.ThestudyaimstoprovideinsightsintotheresponseofSCRsindifferentsoilconditionsandtoproposeaccuratemodelsforpredictingthecutoffbehavior.
Introduction:
DeepwateroilandgasexplorationactivitieshavenecessitatedthedesignandinstallationofSCRs,whicharesubjectedtocomplexloadingsinharshenvironments.OnecriticalaspectofSCRdesignistheinteractionbetweentheriserpipeandthesurroundingsoil.Thebehaviorofthesoil-pipesystemgreatlyinfluencesthestabilityandintegrityoftherisersystem.Understandingthisinteractionisvitalforachievingefficientandsafedevelopmentofdeepwaterfields.
ExperimentalMethodology:
Theexperimentalstudywasconductedinacontrolledlaboratorysetting.Ascaled-downmodelofadeepwaterSCRwasfabricated,allowingforrealisticsimulationofsoil-pipeinteractionconditions.Themodelwasinstrumentedwithstraingaugesanddisplacementsensorsformonitoringtheaxialandlateralresponseoftheriserunderdifferentloadingscenarios.Acustom-designedsoilchamberwasconstructedtosimulatevarioussoilconditionsrelevanttodeepwaterenvironments.
ResultsandDiscussion:
TheexperimentinvolvedapplyingdifferentaxialandlateralloadstotheSCRmodelwhilesubjectingittovaryingsoilconditions.Thedataobtainedfromthestraingaugesanddisplacementsensorswereanalyzedtounderstandthesoil-pipeinteractionbehavior.Theresultsshowedthattheresistanceofferedbythesoilsignificantlyinfluencestheresponseoftheriser.Additionally,lateralloadsinducedsignificantbendingmomentsanddeflectionsintheSCRmodel,highlightingtheneedforaccuratepredictionmod