船体断裂数值模拟单元失效应变研究.pdf

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1、⭣䈧к⎧Ӕ䙊བྷᆖ⺅༛ᆖս䇪᮷㡯։ᯣ㻸ᮦঋᤕ⁗ٲཧ᭾ᓊ਎⹊ガщѐφ㡩㡦о⎧⌻㔃ᶴ⢙䇮䇑ࡦ䙐⺋༡⭕φᕐ㖾ޠሲᐾφ䱸䴷࢟ᮉᦸк⎧Ӕ䙊བྷᆖ㡩㡦⎧⌻оᔪㆁᐕ〻ᆖ䲒2013ᒤ1ᴸDissertationSubmittedtoShanghaiJiaoTongUniversityfortheDegreeofMasterofEngineeringStudyontheElementFailureStrainbySimulatingHullFractureCandidate:ZhangMeilanAdvisor:AssociateProf.Chen

2、ZhenSpecialty:DesignandConstructionofNavalArchitectureandOceanStructureSchoolofNavalArchitecture,OceanandCivilEngineeringShanghaiJiaoTongUniversityJan.2013к⎧Ӕ䙊བྷᆖ⺅༛ᆖս䇪᮷᪈㾱㡯։ᯣ㻸ᮦঋᤕ⁗ٲཧ᭾ᓊ਎⹊ガ᪎㾷㻲㓩ᦏՔᡰᕅ䎧Ⲵ㔃ᶴ⹤ൿᱟ㡩㡦о⎧⌻ᐕ〻㔃ᶴཡ᭸Ⲵѫ㾱ᖒᔿѻаˈᮠ٬⁑ᤏᯩ⌅ᱟ⹄ウ䈕䰞仈Ⲵ䟽㾱ᯩ⌅DŽᵜ᮷Ӿᆿ㿲кޣ⌘㻲㓩Ⲵᢙኅо㔃ᶴᮤփⲴ࣋ᆖ㹼Ѫˈ⹄ウ㡩փᯝ㻲

3、ᮠ٬⁑ᤏѝঅཡ᭸ᓄਈⲴ⺞ᇊᯩ⌅ˈѪ䟷⭘ᮠ٬⁑ᤏᯩ⌅␡ޕ⹄ウ㡩㡦৺⎧⌻㔃ᶴ⢙⹤ൿཡ᭸઼㧧ᗇ㔃ᶴᶱ䲀᢯䖭㜭࣋ᨀ׋׍ᦞDŽ䇪᮷Ⲵѫ㾱ᐕ֌ᴹ˖˄1˅ᔰኅ㌫ࡇ㻲㓩ᶯ᣹ըᯝ㻲䈅傼DŽṩᦞ㿴㤳઼᣹ը䈅傼㻵㖞Ⲵ㾱≲ˈ䇮䇑㻲㓩ᶯቪረǃ亴ࡦ㻲㓩ࡍ࿻䮯ᓖԕ৺⺞ᇊ࣐䖭ᯩᔿㅹDŽᔰኅн਼㻲㓩৲ᮠⲴ᣹ըᯝ㻲䈅傼ᶕ㺘ᖱ㻲㓩ᶯᆿ㿲࣋ᆖ⢩ᙗⲴս〫䖭㦧ᴢ㓯ǃ䖭㦧ᶱ٬઼ᴰབྷը䮯䟿ㅹᮠᦞDŽ˄2˅অཡ᭸ᓄਈⲴ⺞ᇊDŽ䟷⭘MSC.Dytranᴹ䲀䖟Ԧ䘋㹼ᴹ䲀ᮠ٬ԯⵏ䇑㇇ˈ࠶࡛ԕ䈅傼㧧ᗇⲴ䖭㦧ᶱ٬ǃᴰབྷը䮯䟿઼㜭䟿Ѫ׍ᦞˈ࠶᷀Ҷ㖁Ṭቪረሩঅཡ᭸ᓄਈⲴᖡ૽ˈ⹄ウঅཡ᭸ᓄਈⲴ⺞ᇊᯩ⌅

4、ˈ䇘䇪Ҷн਼׍ᦞ⺞ᇊⲴཡ᭸ᓄਈ䇑㇇㔃᷌о䈅傼Ⲵ䈟ᐞDŽ˄3˅㇇傼䇱অཡ᭸ᓄਈ䘹ਆⲴਸ⨶ᙗDŽ࠶࡛ԕ䖭㦧ᶱ٬ǃᴰབྷը䮯䟿઼㜭䟿Ѫ׍ᦞⲴঅཡ᭸ᓄਈˈ࠶᷀∄䖳䇑㇇㔃᷌о䈅傼٬䰤Ⲵᐞᔲˈ傼䇱অཡ᭸ᓄਈ䘹ਆⲴਸ⨶ᙗDŽ˄4˅ᮠ٬䇑㇇㡩փ⭢ᶯᶯᷦ᣹ըᯝ㻲ˈ࠶᷀ަᯝ㻲⢩ᙗDŽṩᦞ⺞ㅜI亥к⎧Ӕ䙊བྷᆖ⺅༛ᆖս䇪᮷᪈㾱ᇊⲴঅཡ᭸ᓄਈᴢ㓯ਆᗇаᇊ㖁ṬቪᓖᡰሩᓄⲴঅཡ᭸ᓄਈˈ⹄ウҶн਼㻲㓩䮯ᓖǃս㖞ԕ৺㓴ਸᛵߥлሩঅੁ᣹ը䖭㦧֌⭘лᶯᷦⲴ࢙։ᕪᓖⲴᖡ૽ˈ㧧ᗇᶯᷦᶱ䲀ᕪᓖˈ㿲ሏ㻲㓩Ⲵᢙኅ䐟ᖴǃ㔃ᶴཡ᭸⁑ᔿ઼ਈᖒ⹤ൿ⢩ᖱㅹDŽީ䭤䈃φᮠ٬⁑ᤏˈཡ᭸ᓄਈˈ㖁Ṭቪረ

5、ˈ⭢ᶯᶯᷦˈ㡩փᯝ㻲ㅜII亥к⎧Ӕ䙊བྷᆖ⺅༛ᆖս䇪᮷ABSTRACTStudyontheElementFailureStrainbySimulatingHullFractureABSTRACTCrackwhichcancausestructuraldamageisoneofthemaintypesoftheshipandoceanengineeringstructuralfailure,andthenumericalsimulationistheimportantmethodtostudythisproblem.Thisthe

6、sisfocusesonmacroscopiccrackgrowthandthewholemechanicalbehaviorofstructures,andthenthedeterminationmethodoftheelementfailurestrainisstudiedtoprovidebasisforlucubratingtheshipandoceanengineeringstructuralfailureandgettingultimatestrengthofthestructuresusingnumericals

7、imulationmethod.Thecontentscompletedinthisthesisareasfollows:˄1˅Developingaseriesoftensiletestsofcrackedplates.Designcrackedplatessize,prefabricateinitiallengthofthecracksanddeterminetheloadingmethodaccordingtotherequirementsofspecificationandtensiletestapparatus.Di

8、splacement-loadcurves,maximumloadanddisplacementwhichcantokenmacroscopicmechanicalbehaviorofthecrackedplatesaregotbydevelopingdifferentten