基于最大載荷的在用含未焊透缺陷壓力管道安全性分析.pdf

1、浙江大學(xué)化工系碩士學(xué)位論文基于最大載荷的在用含未焊透缺陷壓力管道安全性分析姓名：陳坡申請學(xué)位級別：碩士專業(yè)：化工過程機械指導(dǎo)教師：金志江20100126浙江大學(xué)碩士學(xué)位論文AbstractAbstractIncompletepenetrationdefectsisairregularshapeweldingdefect，owingtocommonexistenceofthesedefectsinpressurepipingsystem，

2、theenterpriseandsocietyhavepotentialriskofaccidentoccurrence，butnowfewresearchesonsafetyassessmentofpressurepipingcontainingincompletepenetrationdefectswerecarriedoutathomeandabroad，SOithasgreatacademicsignificanceandapp

3、licationvaluetostudyonthisassessmenttechnology，aimingtokeytechnologiessuchasdeterminationofplasticfailureloadsofstructurescontainingdefects，engineeringpredictionofmaximumloads，engineeringsimplifiedmethodofrootmorphologyo

4、fincompletepenetrationdefectsandestablishmentofsafetyassessmentcurve，theoreticalanalysis，numericalcalculationandexperimentalverificationwerecarriedout，themainresearchachievementsareasfollows：(1)Becausethedeterminationmet

5、hodsofplasticfailureloadhasnotafixedstandard，themaximumloadsofpressureequipmentswereusedastheplasticfailureloadsintheprincipleof”fitnessforpurpose”todefectassessmentForthecomplexityandlimitationofcalculatingthemaximumloa

6、dsusingelastic—plasticanalysis，plasticfailureloadestimationmethodoffailureassessmenttechnologyWasextendedtoplasticlimitloadcalculationofindustrialpressurepipewithincompletepenetrationdefects，thiscanguaranteethecalculatio

7、nresultsisnonconservativeandsafe(2)ThesimplifymethodofincompletepenetrationdefectswhichwascompromisedwithregularizationoftherootmorphologyofincompletepenetrationdefectsandcalculationofplasticfailureloadWassubmittedinthis

8、thesisThiscanprovidesatheoreticalbasisforthesimplificationofthedefects，andalsohasimportantprojectsignificancefortheconstructionofsafetyassessmentforpressurepipingwithincompletepenetrationdefects(3)Theflowstressratiothate