管道在外力作用下變形機理研究.pdf

1、學(xué)位論文創(chuàng)新性聲明本人聲明所呈交的學(xué)位論文是我個人在導(dǎo)師指導(dǎo)下進行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標注和致謝中所羅列的內(nèi)容以外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果；也不包含為獲得西安石油大學(xué)或其它教育機構(gòu)的學(xué)位或證書而使用過的材料。與我一同工作的同志對本研究所做的任何貢獻均已在論文中做了明確的說明并表示了謝意。申請學(xué)位論文與資料若有不實之處，本人承擔一切相關(guān)責(zé)任。論文作者簽名：避整日期：№姓：Q6：亟學(xué)位

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3、ct：Speciality：Name：Instructor：StudyonthemechanismofpipeHnedeformationundertheexternalpressureChemicalProcessMachimeryWeiChen(sKangYong(Withthedevelopmentofoilandgaspipeline，naturalfactorsalongthepipelinesuchasearthquakes

4、，debrisflow，landslide，rockfall；humanfactorsliketraffic，pipelineconstructionsareallincreasingtheinfluenceonthesafeoperationofthepipelineTheexternaleffectsofthesefactorsonthepipelinearemainlyreflectstoaforcewhichlocationan

5、dsizeisdifficulttoestimatedUnderthiskindofforces，thedynamicresponseofpipelinebecomeunknownandwhetherthepipelineoperationsatisfiedthesafetyrequestalsobecomeuncertainlyInaddition，thestructurecharacteristicsofpipelinewithla

6、rgediameterthinthicknessmakeitextremelyeasytobedeformedSuchexternalforcesonthepipelineaggravatedtheeffectswhichmaycausepipelinefailurebydeformationThispaperismainlystudiedthepipelinedeformationmechanismunderimpactingload

7、swhichcausedbytherockfallFinallyweprovidesometheoreticalbasisavoidingpipelinefailurecausedbydeformationThispaperattempttoexplainingthedeformationmechanismofpipelineundertheactionofrockfall，theanalysisisseparatedintotwopa

8、rts：theorycalculationandnumericalsimulationSomehypothesisisbeensetupduringtheprogressoftheorycalculation：firstthepositionwhererockfallhittingsoilisabovethepipeline，secondduringtheprogressofcollisionthelawofenergyconserva

9、tionwasestablishedTheconclusionbasedontheorycalculationprovidesconvenientforengineeringapplybutthehypothesismakestheconclusiondifferfromtheactualconditionsNumericalsimulationcouldreflecttheactualconditionoftheproblems，th

10、econclusionbasedonnumericalsimulationcouldbeusedasareferencefortheoreticalresultsInthispapertwoanalysismethodswereusedtogetthebestobjectiveconclusionInthispapersuchworkshavebeendone：Analyzingthepotentialmotionofrockfallw

11、henfallingfromtheslope，thengetthecollisionvelocitybasedondifferentmovementpattemandrockfallvolume；Accordingtothelawofenergyconservationweobtainedtheimpactloadwhenrockfallhittingsoil；AccordingtotheBoussinesqformula，impact

12、ingloadtransmittedfromsoiltopipelinewasgotten；Axialdynamicresponseofpipelinebasedonmodelofelasticfoundationbeamwasgotten，Lateraldynamicresponseofpipelinebasedonmodelofplanarclosedcurvedbeamwasgotten；Wehavecheckedthesafet