压力容器2012，Vol.29Issue(5)：31-35,45,6.DOI:10.3969/j.issn.1001-4837.2012.05.007
球罐环焊缝接头残余应力的三维非线性有限元分析
Analysis of 3-D Nonlinear Finite Element of Residual Stresses in Spherical Tank Girth Welding
摘要
Abstract
A three - dimensional FEM considering mobile heat source has been founded to analyze transient temperature field and welding stress - stain field in spherical tank girth welds. In the thermal elastic -plastic analysis,the non -linear material properties were also considered. The procedure code has been compiled to deal with the moving heat source by means of APDL of ANSYS. The method of element "birth and death" has been used to simulate the weld pool's melting and solidifying. Finally,the distributions of welding temperature field and welding stress - stain field were given. The analysis results of temperature field indicated that; each maximum temperature by welding wasn't equal with different heat inputs,speeds and load volumes of heat source. The analysis results of stress field indicated that:there were bidirectional tensile residual stress (meridional stress and circumferential stress) on the weld seam and near the weld zone of inner surface in the spherical tank,while on the corresponding region of the outer surface,the meridional residual stress was compressive stress, but the circumferential residual stress was tensile stress.关键词
球罐/焊接/残余应力/非线性有限元Key words
spherical tank/welding/residual stress/nonlinear finite element method分类
机械制造引用本文复制引用
杨晓翔,龚凌诸,陈仲波..球罐环焊缝接头残余应力的三维非线性有限元分析[J].压力容器,2012,29(5):31-35,45,6.基金项目
福建省质量技术监督局科技项目(FJQI2008035) （FJQI2008035）
