2023年2月材料开发与应用文章编号:1003-1545(2023)01-0009-08■■■■■■■■■■■■■■■■■■焊接技术甲板分段焊接变形仿真与控制丁鹏龙,成应晋,何亮(中国船舶集团有限公司第七二五研究所,河南洛阳471023)摘要:采用热弹塑性有限元方法开展了甲板分段焊接数值仿真,基于三维Shell单元和双椭球焊接热源模型获得了结构温度变化和应力场,得到了甲板分段焊接变形及残余应力分布特点,同时探究了纵向和横向型材15种焊接装配顺序以及3种甲板分段拘束形式对残余应力和焊接变形的影响规律。结果表明,所设计的对称交替焊接方法对应的焊接变形最小,即先从船舯向舷侧焊接纵骨,再从中间向两端交替焊接横向桁材,最后从船舯向舷侧焊接纵向桁材;在甲板分段边缘和中心施加压条约束可获得变形控制与工作量的最佳平衡;通过优化焊接顺序和约束方式,可有效实现大型甲板焊接精度控制。关键词:焊接模拟;甲板分段;焊接顺序;焊接约束;焊接变形中图分类号:TG404文献标识码:ANumericalSimulationandControlofBlockWeldingDeformationofLargeSteelDeckDINGPenglong,CHENGYingjin,HELiang(LuoyangShipMaterialResearchInstitute,Luoyang471023,China)Abstract:Theweldingdeformationoflargesteeldeckblocksisstudiedbythethermalelasticplasticfiniteelementmethod.Thechangeofthestructureandstressfieldcanbeobtainedbasedonthe3DShellelementandthedoubleellipsoidheatsourcemod-el,andthentheweldingdeformationoflargesteeldeckblocksandtheresidualstressdistributioncanbeacquired.Theinflu-encesofdifferentweldingsequencesandfixturearrangementsofthedeckbocksontheresidualstressandtheweldingdeforma-tionarestudied.Theresultsshowthatthedeformationcausedbythesymmetryalternantweldingmethodisthesmallest.Theweldingdeformationandtheamountofworkarebothsmallwhenputtingbattenstotheedgeandcenterofthedeckblock.Byop-timizingtheweldingsequenceandfixturearrangement,theweldingofthelargesteeldeckcanbeaccuratelycontrolled.Keywords:weldingsimulation;deckblock;weldingsequence;fixturearrangement;weldingdeformation收稿日期:2022-05-17作者简介:丁鹏龙,男,1988年生,主要从事焊接研究。引用格式:丁鹏龙,成应晋,何亮.甲板分段焊接变形仿真与控制[J].材料开发与应用,2023,38(1):9-16.DINGPL,CHENGYJ...