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上海交通大学硕士学位论文半潜式平台稳性研究姓名：贾慧荣申请学位级别：硕士专业：船舶与海洋结构物设计制造指导教师：谭家华20041201I2STABCADDNVIISTABILITYSTUDYOFSEMISUBMERSIBLESABSTRACTWiththeworld’sdevelopmentofdeep-seaoilexploration,newgenerationofsemi-submersiblesaremakingafastprogressfortheirdeeperoperatingdepth,largerchangeabledeckload,morereserveability,simpleshapestructure,excellenthullsecurityandabilityofanti-stormandself-support.Inourcountry,wecandevelopnewgenerationofsemi-submersiblesbythewayofdeep-seaupgradingofexistentsemi-submersibles.Thispaperpresentsdeep-seaupgradingscenariofor“NH2”semi-submersible.Takingthescenarioasanexample,theauthorcalculatesitsstaticperformanceandstabilitybysoftwareSTABCAD.TheauthoralsostudiestheeffectofdifferentwinddirectionsanddifferenttiltaxistostabilityincludingintactanddamagedstabilityonthebasisthatstabilityofunithascompliedwithDNVregulationsandfindsthemostdangerouswinddirectionandtiltaxisasaresult.Atthesametimetheauthorstudiesthefactorsthataffecttheinitialstabilitywhensemi-submersibleisinthecourseofballasting.Thescenariothatthispaperpresentsandtheresultofstabilitystudieshaveveryimportantreferentialvaluesfortheupgradingofthesimilarsemi-submersibles.KEYWORDS:semi-submersibles,stability,staticperformance,upgrading,ballasting2004123011.1⎪⎪⎪⎪⎪⎩⎪⎪⎪⎪⎪⎨⎧⎪⎪⎩⎪⎪⎨⎧⎪⎪⎩⎪⎪⎨⎧)(TLP300m230200m%25~%151.21977ARGYLL19961321997147199816520001702002175182931EXD3122286m2591m3048mNOBLECLYDEBOUDREAUX3048m1)0.24.02)3)4)5)6)1.32071%3730m30006000m73.83%0200m7.49%100m2002400m4001500m1500m2001110200315045200m256457m22STABCADDNVSTABCAD221.421.4.122AKERH319741978197842252108.20m67.36m36.58m39.65m21.34m6.10m18.29m7.92m5.79m86.71m10.98m40308.8m7620m19851.4.2222(1)13.7145.46.711-16fig.1-1upgradingofpontoons1-1(2)7.9232.929.141-2fig.1-2upgradingofcolumns1-26.424.2521.3418.727718.2918.43313001.51.5.12xyz1.5.20x0x82.1STABCAD2STABCADZentech.Inc1234ABSDNVDEN2.1.1STABCADSTABCADPRESTABBETASTABCADPOSTSTABSTRUPLOTPRESTABCADBETAOFFSID9IDIDID1.1)2)(ZID)3)ID2.1)33XYYZXZXYYZXZ2)3)4)3.1)2)3)4)4.1)2)3)ID4)5.1)102)3)ASCIIBETAPRESTABBETAOFFSPRESTABBETASTABCADSTABCADBETAPOSTSTABASCIIASCIIPOSTSTABPOSTSTAB1.112.3.4.STRUPLOTSTABCADSTABCAD22.1.2STABCADSTABCAD1)2)3)4)5)122.22DNVOFFSHORESTANDARDDNV-OS-C301,STABILITYANDWATERTIGHTINTEGRITY,.2.2.1D100101KG10213D30030130%3022.2.2E1001012005001021030.600.850.95104600700402E40040125.8m/s(50kn)700171444012)72402257E700701353151.51/81.512436D2002061163.1STABCADSTABCAD1)DNV2)3)4)5)6)STABCAD23-117fig.3-1modelofupgraded“NH2”semisubmersible3-123.2STABCAD23.2.13-2186.719.75fig.3-2displacementcurveofunit3-23.2.23-39.759.7519fig.3-3centerofbuoyancycurveofunit3-33.2.33-420fig.3-4floatingcenterofwaterplaneofunit3-43.2.4TPC13-56.71TPC6.7113.879.91TPCTPC13.87TPC21fig.3-5tonsofperimmersioncurveofunit3-5224.110150.154-12fig.4-1curveofmetacentricheightrespondingtodifferentdrafts4-14-19.7515.24KMKBKM=KB+BMBM23KBIBM=I/KM9.7515.24GM=KM-KG4-2GMTGML13.72GMKM13.72KMGMKGKM13.7224fig.4-2curveofGMrespondingtodifferentdrafts4-213.720.296.450.00730.045120.25.914.21015212523936.05m/s51.5m/s4.2.16.44-34-44-59.289.5315.661.3fig.4-3rightandheelingarmfor0degreetiltintransitcondition4-3026fig.4-4rightingandheelingarmfor39degreetiltintransitcondition4-439fig.4-5rightingandheelingarmfor90degreetiltintransitcondition4-590274.2.221.344-64-74-83.123.037.641.3fig.4-6rightingandheelingarmfor0degreetiltinoperatingcondition4-6028fig.4-7rightingandheelingarmfor39degreetiltinoperatingcondition4-739fig.4-8rightingandheelingarmfor90degreetiltinoperatingcondition4-890294.2.318.34-94-104-112.12.044.41.3fig.4-9rightingandheelingarmfor0degreetiltinsurvivalcondition4-9030fig.4-10rightingandheelingarmfor39degreetiltinsurvivalcondition4-1039fig.4-11rightingandheelingarmfor90degreetiltinsurvivalcondition4-1190314.34.3.14.24-122fig.4-12arearatiorespondingtodifferenttiltsaxis4-124-122020239324.3.24.24.3.14-134-180203990-20-39fig.4-13arearatiorespondingtodifferentwinddirectionsinthreeconditionsfor0tiltaxis4-130fig.4-14arearatiorespondingtodifferentwinddirectionsinthreeconditionsfor20tiltaxis4-142033fig.4-15arearatiorespondingtodifferentwinddirectionsinthreeconditionsfor39tiltaxis4-1539fig.4-16arearatiorespondingtodifferentwinddirectionsinthreeconditionsfor90tiltaxis4-1690fig.4-17arearatiorespondingtodifferentwinddirectionsinthreeconditionsfor–20tiltaxis4-17–2034fig.4-18arearatiorespondingtodifferentwinddirectionsinthreeconditionsfor–39tiltaxis4-18-394-134-180-60-120-900-18090-3030-909039-39-2020xyx,354.3.3[3]04-19-20-90fig.4-19theeffectoftheinitialtrimtothestabilityinthreeconditionsfor–20and–90tiltaxis4-19-20-904-1904364.421)2)3)4)5)6)375.12DNV25-15-25-12468357fig.5-1thecompartmentdivisionofplatform’spontoon5-138fig.5-2thecompartmentdivisionofplatform’scolumnandcolumnsponson5-25.25.2.126.4DNV5-13452115-35-739fig.5-3damagedstabilityofunitintransitconditionwithcompartment3damaged5-33fig.5-4damagedstabilityofunitintransitconditionwithcompartment4damaged5-4440fig.5-5damagedstabilityofunitintransitconditionwithcompartment5damaged5-55fig.5-6damagedstabilityofunitintransitconditionwithcompartment2damaged