• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (2): 82-90.doi: 10.3901/JME.2019.02.082

• 材料科学与工程 • 上一篇    下一篇

大变形海底管道工程临界评估研究进展

赵晓鑫1,2, 徐连勇1,2, 荆洪阳1,2, 贾鹏宇3, 黄江中4   

  1. 1. 天津大学材料科学与工程学院 天津 300072;
    2. 天津大学天津市现代连接技术重点实验室 天津 300072;
    3. 天津市特种设备监督检验技术研究院 天津 300192;
    4. 海洋石油工程股份有限公司 天津 300452
  • 收稿日期:2017-07-19 修回日期:2018-04-17 出版日期:2019-01-20 发布日期:2019-01-20
  • 通讯作者: 徐连勇(通信作者),男,1975年出生,博士,教授,博士研究生导师。主要研究方向为焊接接头ECA评估及疲劳、蠕变,发表论文80余篇。E-mai:xulianyong@tju.edu.cn
  • 作者简介:赵晓鑫,男,1987年出生,博士研究生,工程师。主要研究方向为焊接结构工程临界评估。E-mail:zxx8743@163.com;荆洪阳,男,1966年出生,博士,教授,博士研究生导师。主要从事焊接结构可靠性评价方面的研究,发表论文200余篇。E-mail:hjing@tju.edu.cn;贾鹏宇,男,1987年出生,博士。主要从事焊接结构可靠性分析研究。E-mail:jiapengyu@163.com;黄江中,男,1983年出生,硕士,工程师。主要从事海洋工程焊接装备及工艺研究。E-mail:huangjz@mail.cooec.com.cn
  • 基金资助:
    国家自然科学基金资助项目(51575382)

Research Progress of Engineering Critical Assessment of Submarine Pipelines with Large Deformation

ZHAO Xiaoxin1,2, XU Lianyong1,2, JING Hongyang1,2, JIA Pengyu3, HUANG Jiangzhong4   

  1. 1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072;
    2. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072;
    3. Tianjin Special Equipment Supervision and Inspection Technology Research Institute, Tianjin 300192;
    4. Offshore Oil Engineering Co., Ltd., Tianjin 300452
  • Received:2017-07-19 Revised:2018-04-17 Online:2019-01-20 Published:2019-01-20

摘要: 大变形海底管道作为长距离深海油气运输的主要载体,其性能非常重要。Reel-lay卷管铺设方法是在传统的S型和J型铺管技术发展而来的可以陆上焊接的铺管技术,在卷管和铺设过程中管道会受到超过屈服强度的较大塑性变形,超出了常规意义上金属材料的力学应用范围,因此需要对管道的安全性进行工程临界评估(ECA)。含缺陷金属材料在塑性阶段的力学评估研究对于大变形海底管道的应用至关重要。工程临界评估常用方法包括EPRI法、参考应力法和参考应变法。介绍EPRI法,包括弯曲条件下管道环向裂纹的J积分解和高、低匹配V型坡口焊缝的极限载荷解,以及通过滑移线理论对冶金复合管V型坡口焊缝的等效转化方法。介绍参考应力法,包括管道极限载荷解的优化以及其在管道双轴应力条件下的修正。介绍修正的参考应变法,使之能够应用于大尺寸裂纹评估。最后将各种方法的优缺点和适用范围予以总结,并提出目前工程临界评估尚未解决的问题。

关键词: GE-EPRI, 参考应变法, 参考应力法, 工程临界评估, 滑移线模型

Abstract: As a major carrier of long distance oil and gas transportation, the performance of large-scale deformation submarine pipelines is crucial. Reel-lay progress of submarine pipelines with large deformation develops from traditional s-lay and j-lay, which is an onshore welding and laying technique. During the process of reeling and laying, pipelines subjects to large plastic deformation which is over yield strength. The deformation is beyond the common mechanical application range of metal. Therefore, it is necessary to give an engineering critical assessment (ECA) of the pipelines for security. The mechanical evaluation of metal with defect on the plastic stage is crucial for the application of large-scale plastic submarine pipelines. The common method of ECA includes EPRI approach, reference stress approach and reference strain approach. EPRI approach is introduced, including the J-integral solution of pipeline with circumferential cracks under bending condition, the limit load solution of high and low mismatch V grove weld, and equivalent method of metallurgical clad pipe with V grove weld by slip-line theory. Reference stress approach is introduced, including the optimization of pipeline limit load solution and its modification under biaxial stress condition. The modification of reference strain approach is introduced, and it can be used in the evaluation of severe cracks. At last, advantages, disadvantages and application range of different approaches are summarized. Issues of ECA are proposed.

Key words: engineering critical assessment(ECA), GE-EPRI, reference strain approach, reference stress approach, slip-line pattern

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