輸氣管線在地質(zhì)災(zāi)害中的力學(xué)行為研究.pdf

1、西北工業(yè)大學(xué)碩士學(xué)位論文輸氣管線在地質(zhì)災(zāi)害中的力學(xué)行為研究姓名：王滬毅申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：固體力學(xué)指導(dǎo)教師：王峰會(huì)20030301A拜S1t殳ACTABSTRACTInthep燃ectofenergytransportationfromthewesttotheeastpipelinescrosstheloessaltiplanotBecauseofitsspeciallandconditions，therearealotofdisa

2、sters，suchascollapse、gulchandlandslideTheyoccurfrequentlyTheycausepipeline輛bedistortedordestroyed。andtheywillbringalotoflossSoitisveryimportanttostudytheofpipelinesThepaperstudiespipelinesbehaviorsbygeomechanics，soilands

3、olidmechanics，Andcomputethecreatedmodel姆thewayofFEMAndresultsare(1)analyzetheforceanddistortiononpipelineundercollapseandgulchintheoryOnthebaseofbeamdeformation，analyzethebeadingmomentanddeformationofpipelinewithfrustaan

4、dwithoutfrustaCakul鬟teatrueproblem，contrastthedifferencesbetweenpipelinewithfrustaandonewithoutfrusta，drawsomeconclusions。(2)onthebaseofWinldermodel，computetheantiforcesofpipelinewithoutfrusta。consideringtheloesscohesion

5、CompotethedistortionandforceofpipelineunderdifferentlengthofcollapseAndgetthestressfieldandthegreatestMisess|ressanditslocation。(3)onthebaseofRankentheoryanalyzethesoillinemodeLInthemodel，theyareconsidered，soileffectupan

6、dunderline，lineweightgaspressureanditsweight。BythewayofFEM，wegetthestressfieldandhegreatestMisesstressanditslocationunderdifferentlandslideconditions。(4)simulatethebuckingconditionofpipelinebypredisngureComputetheforcein

7、pipelineunderinnerpressureandcoaxialforcesAndgettheconclusionthatthereisabruptchangeofstressinthedefectlocationS。it’sthepositioneasytobebucklingKeyWOrds：pipeline，loessgeo—disastersoil—pipelinereciprocityFEM，stressfieldbu