高溫海底管道溫度應(yīng)力計算與屈曲模擬研究.pdf

1、大連理工大學(xué)博士學(xué)位論文高溫海底管道溫度應(yīng)力計算與屈曲模擬研究姓名：趙天奉申請學(xué)位級別：博士專業(yè)：船舶與海洋結(jié)構(gòu)物設(shè)計制造指導(dǎo)教師：段夢蘭黃一20080801離溢海底管道瀑凌應(yīng)辦計算與震夔模擬研究ResearchonThermalStressandBucklingofliTSubmarinePipelinesAbstract豫ispaperfocusonstrengthandbucklinganalysisoftypicalCNOOCs

2、ubmarinepipelinesunderHT／HPconditionsanddevelopesanalysismethodsonmermalstresscalculationandbucklingevaluationofthem1)Forthermalstresscalculationofsubmarinepipelines，onthestageofbasedesign，anewanalyticalmodelisdevelopedf

3、ornoncompliantPIPsystems，inwhichtheaxialgradientsoftemperatureandpressureonthepipelineareincluded，andthehoopstressandaxialstressareexpressedbytheseriesofModifiedBesselFunctionsofthefirstkindandsecondkind。Couplinganalysis

4、withthefrictionforcesoftheseabedandexpansionspoolforcesCanbecarriedoutbyusingtheseanalyticalformulaeForthestrengthcheckofdetaildesign，ring—pipesubstructureelementsaredeveloped，onwhichthesubseapipelineandexpansionspoolsat

5、theextremitiesCanbesimulatedtogetherinonecell—elementmodeldependingoncurrenthardwareandsoftwareresources，Sepeatedcalculationsofstiffnessmatrixesofsamering—pipesectionsanderrorsinducedbythesimplificationoftheboundarycondi

6、tionofaninterceptionmodelareavoided。2)Forsinglepipebuckling，newFEanalysismethodsandpreheatedresolvingschemesarestudied，mainlyonthejudgementsofcriticalbucklingloads，postbucklingstrengthanalysis，preheatingtemperatureselect

7、ionsandbuckleinitiationtechnologiesAtthesalTletime，a蔭dperturbationmethodbasedonbucklemodesisdevelopedtomodelpipelayimperfection，SOanentiresnap—throughprocessofpipelinebucklingcanbeacquired3)CompliantPIPsystemshavemoreris

8、kofbucklingaSawhole，SOthedisposingdistanceofringplatesconnectingthecartierpipeandthejacketpipeshouldbeselectedcarefullytokeepthermalstabilityandpostbucklingsafetyNoncompliantPIPsystemsgenerallywouldhardlybuckleasawholebu

9、tthecarrierpipemaybuckleintheannularspaceSOthepostbucklingprocessofthenoncompliantPIPsystemsneedtobefullyevaluatedandthereasonablepreservingclearanceintheannularspaceshouldberecommended。Forthefirsttime，theupheavalbucklin

10、gofthecrossingPIPsystemssectionisstudied，andtheanalysisresultsindicatethatthepostbucklingofsuchsectionmayinducehighstresses，evenamodetransition，Seactionforceandmomentoftheanchoringmattressshouldbechecked。KeyWords：Submari