參數(shù)化的船體平板分段焊接變形預(yù)測.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文參數(shù)化的船體平板分段焊接變形預(yù)測姓名：李巧彥申請學(xué)位級別：碩士專業(yè)：船舶與海洋結(jié)構(gòu)物設(shè)計制造指導(dǎo)教師：任慧龍20070101哈爾濱工程大學(xué)碩士學(xué)位論文ABSTRACTWeldingdeformationsofshiphullblockscallsegreatdifficuityduringtherestweldandassemblyoftheslrucn鵬Thuspreciselypredictingthede

2、formationsoflargeshipblocksisworthwhileinengineeringpracticeTheequivalentloadmethodbasedontheinherentstrainisafastdevelopedpredictionmethodtheseyearsbutasforlargestructures，ittakesalongperiodtocalculatethedeformationAppl

3、yingparametrictechnologytopredictionofweldingdeformationwilllargelyincreasetheanalysisefficiencyandthisresearchsubjectwillhaveade印andlongtermmeaningTheequivalent10admethodbasedontheinherentstrainiSstudiedtoanalyzetheweld

4、ingdeformationsofrealshipsectionsThedetailsarcasfollows：1Therulesofweldingtemperaturefielddependent011timeandspacealeanalr／eabysimulatingthethre濺mcnsionaltransienttemperatureforbeadonplateweldingandfilletweldingandtheexp

5、eriencedhighesttemperaturesofthetlansvefsesectionareobtained；theparametricprogramiscomposedandbyrerunningitforseveraltimes，theeffectsofthethreeparametersonthetemperaturearestudiedandthequantitativeconclusionsareobtained2

6、Degreeofconstraintdistributionsbasedondifferentweldingsequencesa∞obtainedbycombiningexperimentaldataandtwiceequivalentloadFEA3InherentstraindistributioniScalculatedthroughthehighesttemperaturesanddegreesofconstraint，acco

7、rdingtoitsoriginprinciple，andtheequivalentloadisobtainedbyintegralwhichimprovesthepredictionprecision4Thereliabilityoftheequivalent10admethodbasedoninherentstrainisdemonstratedbYcomparingthecalculatedresultstotheexperime