外压锥壳有限元模拟分析

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1、浙江工业大学硕士学位论文RESEARCHOFFINITEELEMENTSIMULATIONFORCONICALSHELLSUBJECTEDTOEXTERNALPRESSUREABSTRACTTheconicalshellisallessentialpartofpressurevessel，itisimportanttokeeptheconicalshellsafeandreliableoperation．Simplifytheconeintotheirequivalentcylinderinengineeringdesign，ASMEⅧ-1，

2、ASMEⅧ-2，EN13445—3adopteddifferentequivalentrules．Thestiffeningringspositionforcylindermoreintuitivethanconebecauseofthelargeendandsmallendoftheconegeometryasymmetry,theeffectivestrengthenrangeforcylinderisO．55．,1Dt．thereisnorelevantrulesaboutthepositionandtheeffectivestreng

3、thenrangeofstiffeningringsforcone．Differencesbetweentheeachstandardaboutexternalpressurecalculatedlengthforcylindrical—conicalshell．Theminimumrequiredareaforcylindrical．conicaliunctioninASMEⅧ．1iSderivedfromtheFarrtheory,didn’tconsiderthepossiblestrengtheningofconicalshell，E

4、N13445—3considercylindrical—conicaljunctionassupportlinewhen口≥30。．Theexistingconventionaldesignstandardaboutthedesignofconicalshellcomefromtheoreticalderivationorempiricalformula．Manyscholarsusingthefiniteelementnumericalsimulationtechnologytostudythestabilityofconewithther

5、apiddevelopmentofnumericalsimulationtechnology．Researchengineeringdesignproblemsforconicalandcylindrical—conicalshellsubjectedtoexternalpressurewithfiniteelementsimulation．忍emainworkofthisresearchcanbesummarizedasfollows：1．Theequivalentrulesforconeineachstandard(GB150，ASMEⅧ

6、-1，ASMEⅧ-2，EN13445—3)arediscussed．Synthesizetheorysourcesofdesignmethodsforconicalandcylindrical—conicalshell．Analysisthesimilaritiesanddifferencesofrulesineachstandard．2．Researchtheequivalentmethodandtheeffectivestrengthenrangeofstiffeningringsforconewithfiniteelementsimul

7、ation．TherelationshipbetweencorrelationcoefficientPandtaperratio九，taperangle口，boundaryconditionareobtained．Theresultsofsimulationshowthatthedegreeofstressattenuationisdifferentonbothsidesofthestiffeningringsforcone，usingo．554Dt／COSO!calculatetheeffectivestrengthenwidthisfea

8、siblewhenconsideringthesimplicityofengineeringcalculation．3．Thestiffeningtingsposi