简介：岸外基金投资因此有很大的吸引力,投资岸外基金有保障吗,许多这类基金其实都不再是岸外

简介：岸外基金投资因此有很大的吸引力,投资岸外基金有保障吗,许多这类基金其实都不再是岸外

简介：8月14日，海上钻井承包商Transocean宣布，与挪威钻井承包商SongaOffshore签署了一项协议，以约34亿美元的价格收购了SongaOffshore的全部股份。

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简介：2010年是BibbyOffshore有限公司运营的第七年。从2003年成立伊始，该公司在致力于提供海底旋工、信息资源管理服务以及海上管理服务的过程中迅速成长壮大。

简介：-Thisarticlebriefshowtoimprovetheholdingpowerofadrillingvessel’sanchorandtoremovethoseunreasonablestructuresbysuchatechnology-underwater-explosiontechnology.Thearticlegivesdetailsofthestructure,characteristicsandapplicationsofarocket-launchedanchor;aswellastheprinciple,properties,applicationsofdirectionalexplosioncutting.

简介：Asystemreliabilityestimationmethodforspatialjacketplatformsisdevelopedinthispaper,Thejacketplatformismodeledintothree-dimensionalassemblyofspatialbeamandplateelementsinFi-niteElementMethod(FEM).Thelimitfailurestatescorrespondtocollapseofaseriesofstructuralmem-berswhichareidentifiedbyengineeringdesigncriteria.Inthispaperthefollowingaspectsaretakenintoaccount:thepunchingshearandbuckiingfailuresinmemberfailuremodesforthetubularjointsandtubu-larcolumnsrespectively;incrementalloadingapproachforestablishmentofthesafetymarginequationsofsystemfailure;thealgorithmofenumeratingsignificantfailuremodesforthestructuralsystemsandotherconcepts,suchasthefalsefailuremodeandthevirtuallimitstate.Thefinalworkisdevotedtothereliabili-tyanalysisforapracticaljacketplatformpresentlyputintooperationontheBohaiSea.Thecomputedre-sultsshowsthatmethodsuggestedinthispaperisfeasibleandeffectivefor

简介：Inthispaper,themainproblemsconcerningreliabilitydesignofoffshoreplatformstructurearedescribedandthegeneralstepsfortheuseofSafetyCoefficientMethodarepresented.

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简介：InthispaperanumericalanalysismethodcombiningFEMincementaltechniquewithlimitanalysisconceptisproposedforthestudyofthestaticstrengthofoffshoreplatformincollision.Largedeformationandplasticityareaccountedforandthelimityieldsurfaceexpressedbygeneralizedstressforatubularsectionisderived.ThemodifiedstiffnessmatrixofspacebeamelementisformulatedbyPlasticNodeMethod.Thebucklingbehaviorofbeamcolumnscanalsobetakenintoaccount.Itcantracethegenerationofplastichingesduringloadingandfinallytheultimatestrengthofoffshoreplatformagainstcollisionisobtained.

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简介：Honjiinstabilityandringingofoffshorestructruresaretwodifferentphenomena.Honjiinstabilityoccursatacircularcylinderintransverseperiodicfinitemotioninawatertank.Itissuperposedonthestreamingflowinducedbythecylinder'sboundarylayer.Itsoscillationperiodishalfoftheperiodofthecylinderoscillation.FinitevolumecalculationsofthefilteredNavier-Stokesequationsvisualizethethree-dimensionalinstability,wherefluidparticlestransportedbythecircumferencialrol...

简介：Studiesoforganicinclusionsfromtheoffshoreoilandgasfieldsprovidemuchinformationaboutthenumberoftimes,temperature,depth,timeandphasestateofoil-gasmigration,aswellasaboutthecompositionoforganicinclusions.Onthebasisofthetype,character,compositionanddistributionoforganicinclusionsintheZhu-ⅢDepressionatthePearlRiverMouth,informationcanbedevelopedaboutthesourcerocksofoilandgas,andtheirevolutionandmigration.

简介：-Tocharacterizetheuncertaintyandfuzzinessinoffshorestructuralinspection,probabilityofdetection(POD)mustbedetermined.ThispaperpresentstheexpressionsforthePODoffourdifferentdamageformsmainlyexistinginoffshorestructures.Thefuzzy-settheoryisappliedtoestimatehumanerrorsthroughthedefinitionofinspectionquality.Expressionsofinspectionqualityareachieved.Toverifythevalidityandcorrectnessoftheexpressions,thedatafromanoffshoreplatformfieldinspectionofevaluationresultsofhumanerrorsaffectinginspectionqualityareusedtoestimatetheparametersofthePOD.TheresultsshowthatthepresentmodelscanprovidebasisforfurtherstudyofofTshorestructuralinspectionreliability.

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简介：Duringthedesignandconstructionofthedeepwateroffshorebasin,itscurrentgenerationsystemisconsideredtobeoneofthekeytechnologies.Inthisarticle,thestate-of-the-artdeepwateroffshorebasinatShanghaiJiaotongUniversitywasexaminedasacasestudy.Different3-Dnumericalmodelsofthecurrentgenerationsystemweredevelopedandcalculated.Theuniformityofflowfieldinthebasin,suchashorizontalandverticalcurrentvelocityprofiles,werecalculatedindetail.Besides,a1:10scaledmodeltestwasalsocarriedout.Thecurrentvelocitiesatdifferentlocationsinthebasinweremeasuredandcomparedwiththecalculatedresults.Itisconcludedthatsatisfactoryagreementcanberesultedbetweenthenumericalsimulationandmodeltest.Inaddition,itissuggestedthattransitionsectionsandturningvanesneedtobesetininflowandoutflowculvertstoimprovetheuniformityofflowfieldinthebasin.Andthehydraulicperformanceofthedeepwatercurrentgenerationsystemcanmeettherequirementsofmodeltestsindeepwater.

简介：Theelementstiffnessmatrixoftheequivalentbeamorpipeelementofthedeformedlegoftheplatformisderivedbythefiniteelementmethod.Thestressesanddisplacementsofsomedamagedcomponentsarecalculated,andthenumeri-calsolutionsagreewellwiththoseobtainedbythefinemeshfiniteelementmethod.Finally,asanapplicationofthismethod,thestressesofsomeplatformstructuresarecalculatedandanalyzed.

简介：Adesignmethodofreinforcedconcrete(R.C.)offshoreplatformswithnonlinearfiniteelementanalysisisproposed.Accordingtothemethod,acomputerprogramisdeveloped.Inthisprogramnonlinearconstitutiverelationshipsandstrengthcriteriaofconcreteandsteelbarsareincluded,andtheprogressivecrackingandcrushingoftheconcretearetakenintoaccount.Basedonthestressdistributionobtainedbythenonlinearfiniteelementanalysis,theamountofreinforcementinthecontrolsectionscanbecomputedandadjustedautomaticallybytheprogramtosatisfytherequirementofthedesign.Theamountofreinforcementrequiredinthecontrolsections,whichareobtainedwiththenonlinearfiniteelementanalysis,isagreeabletothatobtainedintheexperiment.ThisshowsthatthedesignmethodofR.C.offshoreplatformwiththenonlinearfiniteelementmethodproposedbytheauthorsisreliableforpracticaluse.