FPSO内转塔式单点系泊浮筒海上安装设计

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Offshore installation design of FPSO internal turret single-point mooring buoy

YANGKun，CHENXiaodong，YANGSheng，ZHANGYifan，XUJianxin CNOOC OffshoreEngineering SolutionsCo.，Ltd.， Shenzhen518067，China

Abstract：Afiniteelementanalysiscombiningstaticanddynamicapproaches isanimportantpartof theschemedesignforfshore instalationandcostructionofintealtuetsinglpintmoingbuos.WithnintealturrtsingleontmoingbuoyofPayu Oilfield inthe South China Seaasaresearchoject，theOrcaFlexsoftwarewasemployed tosimulatethewholeprocessoffshore installtionofthebuoy.Byanalyzingtheliftingofthesingle-pointbuoythroughthesplashzone，themaximumalowableoperation windowwasobtained.Throughstabilityasessmentofthesingle-pointbuoyfrelyfloatingonthewatersurface，thesignificantwave heightlimitforpersonnelworkingontetopofthebuoyasdesigned，andthedesignofclumpweightsforstabilitycontrolandtheir connectinglockingdeviceswasverifiedtobereasonableandfeasible.Thesinkinganalysisof thesingle-pointbuoyindicatedthatthe designofclumpweightsforsinkingandtheirconmectinglockingdevics asrationalandfeasible.Thehook-upprocessanalysisofthe mooringlegshowedthatafterthelegwashookedup，approximatelyhalfoftheloadontheriggingwastransferrdtotheleg.Thehookupprocessanalysisofdynamiccablesrevealedthat tesingle-pointbuoysankbyapproximately10metersfollwingthecablehookup. Theabove-mentionedsimulationanalysesshowthattheweightoftwoclumpweightsandthelengthofconectinglockingdevicessuit therequirementsforonstruction.Tepropoedlimitsforfsoreistalltionaresuitablefortemaximumallowableoperationwindow， and the designed scheme for offshore installation and construction is feasible and safe.

KeyWords：single-point buoy; installation scheme; OrcaFlex; maximum alowable seastate; stability; load transfer

单点系泊系统因其风向标效应能够适应恶劣海况，在我国南海、欧洲北海和墨西哥湾的浮式生产储油卸油装置（FloatingProduction Storage andOffloading，FPSO）中得到广泛应用[1-3]。（剩余7650字）