油管螺紋連接的力學分析與失效機理研究.pdf

1、石油大學（華東）碩士學位論文油管螺紋連接的力學分析與失效機理研究姓名：楊春艷申請學位級別：碩士專業(yè)：機械工程指導教師：李安20030901MechanicsanalysisandfailuremechanismstudyoftubingthreadedconnectionPostgraduate：YangChunyanDirector：LiAnSpeciality：MechanicalDesignandTheoryInstitution

2、：UniversityofPetroleumAbstract：ThestudyofintegritycapacityoftubingconnectorshasbeenwhatmanyresearchersconcemforalongtimeThestudyincludesthreemainproblems：thefirstisabouttensilestrengthofconnectors，thatis，howtoimprovethes

3、ustainabililyoftubingconnectors；thesecondisaboutfailureoftubingthreadbecausetubingjointsarethreadedupanddownonceagain；thethirdisaboutsealingandanti—gluingpropertyofconnections，thatis，howtoimprovethemechanicalsealreliabil

4、ityandantigluingproptertyPresentlytheloadcapacityofthetubingconnectorsislowerthantheintensityofthetubingThereasonsofthedestructionoftubingconnectorthreadarevarious，Thesearerelatedtomanyfactorssuchasthestructureoftheconne

5、ctors，theshapeofthescrewthreadridge，thematerialpropertyitselftheeFrorandprecisionofdesignandmanufacture，thedesignmethodoftubingstring，thelocalpracticalskillsandoperations，etcThispaperpresentstheperformancesimulationoftub

6、ingconnectionsoilwellsusingthefiniteelementanalysissoftwareANSYS，withtheresearchtargetsofthecastingconnectionswithtrianglethreadItisthefirsttimethatthemake—tipstateofthreadconnectionisstructuredasbincontactelement，whichr

7、ealizesthesolutionmethodbynnionofcontactelementsandplasticitysolutionsAtthesametime，theinterfaceprogramfortheANSYSgeometrymodelingusinghighlevellanguageisprovided，whichimprovestheefficiencyofbuildingupandrevisingmodelsIn

8、thispapertheloadanalysisofthetubingconnectorsisperformedtheoreticallyandtheIoadconditionofeachscrewthreadridgeisanalyzedThisisofgreatsignificanceintheanalysisoftheloadcapaeityandthefailuremechanismofthetubingconnectorsAt

9、last，basedontheanalysisofgluingfailureprocessanditsmaininfluencefactors，theconclusionismadethatcontactstressdecidesthread‘gluingandthemeasurestoimproveanti—gluingproperlyoftubingconnectorsarepresentedKeyWords：tubingcotme