熔化焊焊接接頭的溫度場和應力數(shù)值模擬.pdf

1、北京交通大學碩士學位論文熔化焊焊接接頭的溫度場和應力數(shù)值模擬姓名：王勇申請學位級別：碩士專業(yè)：材料加工工程指導教師：李衛(wèi)京20090601=!匕塞鑾適太堂亟堂位逾塞△旦墨!B△￡!ABSTRACTABSTRACT：TheresidualstressinabilityofbearingloadsTherefore，itweldingstructurecandirectlyinfluencetheirisallimportantsubjec

2、twhichneedsaccuratelyestimatetheresidualstressintheprocessofweldinginordertoensurethesafetyofthestructureThispapersystemicallydiscussestheweldingprocessviathefiniteelementanalyticalsystemANSYS，mainlyconcentratingonofthe3

3、Ddynamicsimulationofweldingtemperaturefieldandstressfield，nextutilizetheresultstosimulatetheweldingprocessofbuttweldingMeanwhile，thecalculationresultshavelittledifferencewithtraditionalanalysisresultandtheoryvalueAllthei

4、nvestigationsareforthecomingsimulationofgoodswagonbogie，akeypartinthetrainThemaincontentsofthepaperareasfollowing：(1)Studyingtherelationalproblemsofnumericalofweldingprocess，suchasthechoiceofweldingheatmodels，meshinggird

5、ingetc(2)TheapplicationofANSYSParametricDesignLanguagetocarryoutsecondtimetapistheadvancedformwhenpeopleuseANSYSInthispaperwhatANSYS’APDLdoesistocompileprogramforemployingloadofmovingheatsource(3)Viathemonitoringtemperat

6、uresystem，somepointsinthetestmodelaremeasuredduringweldingprocessbymeansofthermocouplesAsaresult，theexperimentaldataisinperfectaccordancewithcalculateddataInconclusion，doingbythiswayCanfirmlyprovideabasisforfurtherresear

7、chofstressandstrainfieldsintheperiodofweldingprocess(4)TheweldingresidualstressanddistortionwerealsomeasuredThedistributivepatternsofresidualstressesmatchedextremelywellwiththeresultsofnumericalsimulationaswellastestifyt

8、heresultsofthenumericalsimulationAsitcanbeenmanifestedbytheresearchandpracticalverifythispaperestablishesafeasibledynamicsimulationmethod0113Dweldingtemperatureandstressfields，whichprovidestheoryevidenceandinstructionand