石油学报 ›› 1991, Vol. 12 ›› Issue (1): 99-106.DOI: 10.7623/syxb199101012

• 石油工程 • 上一篇    下一篇

十万立方米浮顶式原油贮罐焊接残余应力分布规律的研究

李广铎1, 刘国山1, 刘柏梁1, 侯贤忠2, 郭其安2   

  1. 1. 大连铁道学院;
    2. 大庆石油管理局
  • 收稿日期:1989-07-13 出版日期:1991-01-25 发布日期:2013-07-08

DISTRIBUTION OF WELDING RESIDUAL STRESS IN A FLOATING ROOF 100,000m3 CRUDE OIL TANK

Li Guangduo1, Liu Guoshan1, Liu Bailiang1, Hou Xianzhong2, Guo Qian2   

  1. 1. Dalian Railway Institute;
    2. Daqing Oid Field
  • Received:1989-07-13 Online:1991-01-25 Published:2013-07-08

摘要: 本文采用盲孔法技术,实测了十万立方米浮顶式原油贮罐的焊接残余应力,找出了该油罐承载最大和最重要部位的焊接残余应力的分布规律。

关键词: 焊接残余应力, 原油贮罐, 应力分布规律, 角焊缝, 交叉焊缝, 立方米, 油罐, 盲孔法, 浮顶, 环向焊缝

Abstract: The residual stress may seriously affect the fatigue strength, initiation and propagation of cracks and stress corrosion of pressure vessels. The welding residual stresses in a floating roof 100,000M crude oil storage tank were measured in the field by means of the Blind Hole Relaxation Technique. The principle of measurement and arrangement of measuring points are described in detail in this paper. This distribution of welding residual stress was obtained on the most important parts of the oil tank where the load was the greatest. The residual stresses in the horizontal and vertical directions for fillet welds, longitudinal welds and circumferential welds in the oil tank were measured accurately. The results of measurement indicates that the residual stress is concentrated in the weld and decrease sharply with a slight departure from the fusion line of weld. The maximum value of residual stress in the weld is close to the yield strength of the parent metal, and the residual stress along the weld direction is much higher than that across the weld direction. However, as the fillet welds by manual arc welding on the oil tank root are made under the condition of serious transverse restraint,the residual stress perpendicular to the weld direction is also fairly high.