高壓管匯破損預(yù)測技術(shù)研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文高壓管匯破損預(yù)測技術(shù)研究姓名：劉春城申請學(xué)位級別：碩士專業(yè)：固體力學(xué)指導(dǎo)教師：楊春秋20000301ABSTRACTWiththedevelopmentofoilandchemistryindustries，thehighpressurepipesjointshavebeenusedcommonlyinthepipesofoilandnaturalgasesnehighpressurepipesjointsare

2、alsonamedaSconcourseofhigllpressurefluidiccontrolcomponentsandtheirthicknessmgreatlyabraSedcausedbyhigherimpactpressureandalternateloads溺曲theincreasingofusingtime。fatiguefracturewillbetakenplaceamongthemD刪ngthetimeofprod

3、uctioninoiJandchemistryindustries，pipeandpipejointsareusedtotransportallkindsofmaterialsOncetheaccidentoccuring，theequipmentwouldbedamagedandevencausedfiring，poisoning，explosionCtcTherefore，thedamagepredictionandusinglif

4、eassessrRedltofhighpressurepipejointswillbecometheissueinengineeringworldBaSedonagreatdealofreferences，HighpressurepipejointshavebeenstudiedprofoundlyFirstlyanalyzingstrength，theelasticplaSticanalysisoftypicalcomponentso

5、fhighpressurepipejointshavebeenfinishedbyusingbrickelementof8nodesoffiniteelementinsolidmechanics，thencorrespondingtheoryorrulesoffiacturemechanicsalsobeusedintheanalysisofone—offfracture，lifepredictionoffatigueandcrackg

6、rowth、(1)Strengthanalysesofstraightpipes：Thestraightpipescanbedevidedintothreestylesaccordingtospecification：3H，2Itand15，selectingonekindoftypicalcomponentsofhighpressurepipejointsunderloadcaseof50MPa，70MPa。100MPa(2)Stre

7、ngthanalysesofmovingangleheads：alsoselectingonekindoftypicalcomponentsof3’。2Hand15’underloadcaseof50MPa70MPa，100MPa(3)Strengthanalysesofteejoints：selectingonekindofentranceandhomeunderloadcaseof50MP丑70MPa100MPa(4)Strengt

8、hanalysesoftheendofstraightpipes：underloadca3eof50MP氐70MPa，1OOMPaAtthesame：timetheoryanalysesoffracturehavebeendonebecausefractureWaShappenedatonetime(5)Analysesofoneofffracturedamageofstraightpipes，endsofstraightpipes，a

9、ngleheadsandteejointshavebeendonebyapplyinglinearelasticplasticfracturemechanicsrules(6)Fatiguefractureanalysesofstraightpipes，endsofs血aaghtpipes，angle—beadsandteejointshavebeendonebyapplyinglowcyclefatiguetheory(7)Crack