摘要
为了掌握管线钢管承压时焊接接头的应力分布情况,采用ANSYS有限元数值模拟软件建立了直缝双面埋弧焊管二维平面模型及三维立体模型,分析了钢管内部承压时焊接接头的应力分布,结果表明:钢管焊接接头等效应力的峰值出现在热影响区;三维模型的应力值大于二维模型,且随内压的增加而增大,并向焊缝处靠近。焊缝的几何尺寸对钢管承压能力也有显著的影响,适当的内外焊缝熔宽和熔深能够提高钢管的承压能力。
In order to grasp the stress distribution of line pipe welded joint under pressure-bearing, two-dimension model and three-dimensional model of double sides longitudinal submerged arc welded pipe were constructed by ANSYS finite element simulating software, and the stress distribution of welded joint of welded pipe under internal pressure was analyzed. The results showed that the equivalent stress peak appears in the heat affected zone. The value of equivalent stress calculated by three-dimensional model is greater than that of two-dimensional model, and the difference value increases with the increase of internal pressure, meanwhile, the equivalent stress moves to weld metal. The weld geometry sizes have great effect on the pressure-bearing capacity of the welded pipe. The opportune size of weld width and weld penetration of the inside and outside weld will improve the pressure-bearing capacity of the welded pipe.
出处
《焊管》
2016年第1期12-16,20,共6页
Welded Pipe and Tube
关键词
直缝埋弧焊管
热影响区
应力
ANSYS软件
longitudinal submerged arc welded pipe
heat affected zone
stress
ANSYS software
