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1、AbstractAbstractTheriserisoneoftheimportantequipmentofdevelopmentoftheoffshoreoilandgas.Morethanshallowsea,marineenvironmentofdeepseariserismorebad.So,therequirementofdeepseaoildrillingriseraboutthematerialselection,structureandmanufacturinginstallationprocessisveryhigh,generallysingleriseris
2、verydifficulttoachievethisstandard.Atpresent,thecompositeriseriswidelyappliedindeepseaoilfieldbecauseofitsrichstructure,goodmechanicalproperties.Becausetheforceoftheriserundertheseaiscomplexwhenworking,theresponseoftheriserundervariousloadingconditionsneedstobeconsidered.Inthispaper,theresear
3、chcontentisasfollows:(1)Akindofdeepseaoildrillingriserwithahightensileperformancewasdesigned.Theriseruseshightensilestrengthofsteelstripastheouterlayermaterialwrappedinstrengthlevelwasrelativelylowcanbeweldedpipeouterwall,includingtherisertube,axialsteelbeltlayerandlayer2differentAngleofspira
4、lsteelband.Thedesignadoptedthemechanicalconnectionoftwokindsofweldingofhighstrengthsteel,thestructuresoftheriserwereabundant.Notonlyhighstrength,lightweightandnoweld,greatlyimprovingtheriserinthestrengthofthejoint.(2)Structuralresponseanalysismodeloftheproposedcompositeriserunderbendingloadwa
5、sproposedandtherelationshipbetweenthestriplayerstrainandlaidofspiralanglewasdeducedinpolarcoordinates,throughtheprincipleofequalstrainenergywiththemomenttodoworkoutside,itwasconcludedthatthecompositepipespiralsteelbeltlayerandcalculationformulaofbendingstiffnessofcompositebendingofthestandpip
6、eatthemechanismofresponsecharacteristics.(3)Theresponseoftheriserunderaxisymmetricloadwasanalyzed.Firstofall,unknownvariablesofresponseofeachlayerundertheaxisymmetricloadwasgiven;Then,equationscorrespondingtounknownvariableswasdeduceaccordingtothebalanceequation,constitutiveequationandthedefo
7、rmationcoordinationequation;Finally,theresponseofthepipeundertheactionofaxisymmetricloadequationisobtained,andrelationshipbetweenthespiralsteelstriplayerlayingangleandcomplexoftheoverallresponsewasdiscussed.(4)Numericalsimulationofthecompound
