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ID:37380624
大小:2.07 MB
页数:82页
时间:2019-05-22
《基于计算机仿真的焊接热循环有限元分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、新疆丈学硕士研究艇学位论文YS口887S提要在焊接过程中,热源沿焊俸移动时,焊件上慕点温度髓时间变化的过穰称为焊接热循环,它怒按述焊接过程中热源对母材金属的热佟用。焊缝及近缝区金攫缌织的交他耪疲力懿产生取决予母檬众属黪化学戒分耪焊接过程申静熟循环特点。表翻焊接热循环静参数主簧有麓燕速液、擒热峰值温凄、稽交温壤戳上停籍时阕爱冷帮速度,这擅瓣素都会彩晌焊籍组缓和往能。戳此,焊接热循环的测试与分析计算其脊重疆瀚实际意义,是分析焊接接头组织性能变化及焊接缺陷生成机理的有效途径,并可通=i过改进焊接工艺,改蒋热循环过程,以达到提赢焊接质基的耳豹。如果焊接热循环能够实现计
2、冀机模拟仿真,我们裁可以通过计算梗‘系统来礁是爆接镑弹结构积材料瓣款疆鼓设计、最佳工慧方法帮垮接参数。本文跌这一点漫发,在慧络蓠久静王律蒸硪上,遗过其豁的试验并结合数氆计算静方法,在对焊接过程产篷豹溢浚场进萼亍了二维帮三维模攒仿粪搿究静蘩础上,摇出了蘩予ANSYS软件的焊接温度沥、焊接热循环的模拟仿真分祈方法,并针对Q235平裰堆弹澜题和16MnR诵爆接进行了实俩计冀,计算结果与试验氇基本吻食。最后奁模拟仿真基础上,缩台焊接CCT豳进行了组织预测分析。关键调:撵接热循环漱凄场有黻元ANsYs彷囊新疆大学硕士研究生学位论文AbstractInthec.ourse
3、ofwelding,thermalresourc:emovingalongtheweldingseam,ateverypointofwhichtemperaturevariesatanytime.allofthesephenomenaiscalledweldingheatrecycle.Itisalsothecirculationwhichthermalresourceheatsthebasicmetal.Thetransformationofmetallurgicaltextureandthedevelopmentofstressintheweldingse
4、amanditsneighborhoodlieonmetallicchemicalconstitutionandweldingheatrecycle.Parametersofweldingheatrecyclemainlyincludeheatingmaximaltemperature,lengthofstayingabovephasetransitiontemperatureandcoolingvelocity.Anyofthesepararneterswillaffectmetallicperformanceafterwelding.Therefore,t
5、estandcalculationofweldingheatrecyclealeveryimportanttoanalyzethechangeofweldingjointtextureandperformance,reasonsofweldingdefects.Byimprovingweldingprocedureandprocessofweldingheatcirculation,wecanimprovethequalityofweldingproductsverywell.Accordingtoweldingheatrecyclesimulatedbyco
6、mputer,wecandecidetheoptimaldesign,techniqueandweldingparameters.Fromthispointofview,basedonpredecessor’Sachievement,goodsoftwareANSYSandagreatmanyofexperimentsincludingQ235and16MnRarcsurfacing,thisarticlehassimulated2-Dand3-Dweldingtemperaturefield,brou【ghtforwardtheanalyticalmetho
7、dofweldingheatrecyclesimulation.Theresultsofsimulationsareidenticalwithexperiments.Intheendofthispaper,accordingtoweldingCCTgraph,wecanforecasttlletextureofweldingseam.Keywords:weldingheatrecycle,temperaturefield,finiteelement,ANSYS,simulationII新疆大学硕士研究生学位论文1.1课题意义第一章序言焊接是通过加热或加压,或两
8、者并用,并且用或不用填充材料,使工件达
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