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[1]易斐宁,杨叠,王鹏宇,等.含根焊裂纹X80管道焊接接头应变能力数值模拟[J].油气储运,2022,41(04):411-417.[doi:10.6047/j.issn.1000-8241.2022.04.007]
　YI Feining,YANG Die,WANG Pengyu,et al.Numerical simulation on strain capacity of welding joint of X80 pipeline with root welding crack[J].Oil & Gas Storage and Transportation,2022,41(04):411-417.[doi:10.6047/j.issn.1000-8241.2022.04.007]

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含根焊裂纹X80管道焊接接头应变能力数值模拟

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 41 期数: 2022年04期页码: 411-417 栏目: 出版日期: 2022-04-25

Title:: Numerical simulation on strain capacity of welding joint of X80 pipeline with root welding crack

文章编号:: 1000-8241（2022）04-0411-07

作者:: 易斐宁¹; 杨叠²; 王鹏宇³; 杨晗¹; 黄安东¹; 刘啸奔²; 刘图³; 1.国家管网集团北方管道公司;2.油气管道输送安全国家工程实验室;3.国家管网集团建设项目管理分公司

Author(s):: YI Feining¹; YANG Die²; WANG Pengyu³; YANG Han¹; HUANG Andong¹; LIU Xiaoben²; LIU Tu³; 1.PipeChina North Pipeline Company;2.National Engineering Laboratory for Pipeline Safety;3.PipeChina Construction Project Management Sub-Company

关键词:: X80管道; 根焊裂纹; 焊接接头; 临界应变; 匹配系数; 数值模拟

Keywords:: X80 pipeline; root welding crack; welding joint; critical strain; matching ratio; numerical simulation

分类号:: TE832

DOI:: 10.6047/j.issn.1000-8241.2022.04.007

文献标志码:: A

摘要:: 自动焊技术在中国大口径、高钢级管道现场焊接过程中广泛应用，出现了由多种因素导致的错边、裂纹等焊缝缺陷，对管道焊接接头变形承载能力造成了严重影响。为了明确含根焊裂纹X80管道焊接接头应变能力变化规律，开展管道环焊接头应变能力数值模拟。以外径1219mm的单V形坡口X80管道焊接接头为研究对象，假定接头处存在工程允许的最大3mm错边以及根焊熔合线位置存在无法检测到的最大25mm×2.5mm的表面型裂纹缺陷，考虑环焊接头根焊、热影响区、母材、填充焊4个区域材料本构关系的差异性，采用数值仿真分析方法，定量分析了载荷形式、母材屈强比及热影响区软化率对焊接接头应变能力的影响。结果表明：通过建立的有限元模型，可以计算得到多种工况条件下含根焊裂纹X80管道焊接接头应变的变化规律，并且得到了以0.25mm为临界韧性值、0.5％为应变能力的符合工程应用需求的安全临界强度匹配系数。研究结果可为含根焊裂纹X80管道焊接接头应变能力的安全评估及工程应用提供参考。（图7，表1，参30）

Abstract:: Automatic welding technology is widely used in the field welding of large-diameter and high-grade steel pipelines in China. Welding defects such as misalignment and cracks caused by various factors have seriously affected the deformation and bearing capacity of pipeline welding joints. In order to clarify the change law of the welding joint of X80 pipeline with root welding crack, the strain capacity of the girth welding joint of pipeline is simulated numerically. Here, the welding joint of a single-V grooved pipeline with an outer diameter of 1 219 mm was studied. It was assumed that a maximum 3 mm misalignment allowed in engineering was located at the joint and an undetectable surface crack defect, 25 mm × 2.5 mm at maximum, was at the fusion line of root welding. Meanwhile, the differences between the constitutive relations of materials in the four areas of root weld, heat affected zone, base metal and filler weld, were considered. Base on that, the effects of loading mode, yield-strength ratio of base metal and softening rate of the heat affected zone on the strain capacity of welding joints were analyzed quantitatively through numerical simulation. The results show that the change law of strain in welding joint of X80 pipeline with root welding crack under various service conditions can be calculated through the established finite element model. Moreover, the critical strength matching ratio satisfying the engineering application requirements is given with the critical toughness value of 0.25 mm and the strain capacity requirement of 0.5%. Generally, the research results could provide reference for the safety assessment and engineering application of strain capacity of welding joint of X80 pipeline with root welding crack. (7 Figures, 1 Table, 30 References)

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相似文献/References:

[1]杨悦,张宏,刘啸奔,等.焊接材料强度对高钢级管道环焊缝应变能力的影响[J].油气储运,2022,41(01):48.[doi:10.6047/j.issn.1000-8241.2022.01.007]
　YANG Yue,ZHANG Hong,LIU Xiaoben,et al.Influence of welding material strength on strain capacity of girth welds in high-grade steel pipelines[J].Oil & Gas Storage and Transportation,2022,41(04):48.[doi:10.6047/j.issn.1000-8241.2022.01.007]

备注/Memo

易斐宁，男，1981年生，工程师，2010年毕业于河北工业大学计算机科学与技术专业，现主要从事油气长输管道工程项目与工程质量方面的管理及研究工作。地址：河北省廊坊市广阳区新开路408号，065000。电话：0316-2170646。Email：yifn@pipechina.com.cn
基金项目：国家重点研发计划项目“临海油气管道及陆上终端设施损伤机理与演化规律研究”，2016YFC0802301；国家自然科学基金资助项目“逆断层作用下X80管道屈曲演化与韧性破损机理研究”，52004314；中石油管道有限责任公司科学研究与技术开发项目“油气管道焊接接头强度匹配及残余应力控制技术研究”， 2018B-3007-0502；新疆自治区天山青年计划项目“复杂载荷作用下高钢级管道韧性断裂与后屈曲失效行为”，2019Q088；中国石油大学（北京）科研基金青年拔尖人才项目“断层作用下高强钢管道失效机理与可靠性评价”，2462018YJRC019；中国石油大学（北京）科研基金资助项目“基于大数据的天然气管网智能运行与控制研究”， 2462020YXZZ045。
（收稿日期：2021-06-25；修回日期：2022-01-25；编辑：韩文超）

更新日期/Last Update: 2022-04-25