复合材料缠绕修复管道的应力分析

doi:10.7623/syxb201302022

石油学报 ›› 2013, Vol. 34 ›› Issue (2): 372-379.DOI: 10.7623/syxb201302022

复合材料缠绕修复管道的应力分析

帅　健 1　刘　惟 1,2 　王俊强 1,3　张宇坤 1

1. 中国石油大学机械与储运工程学院北京 102249; 2. 中国石油天然气勘探开发公司北京 100034;3. 中国特种设备检测研究院北京 100013

收稿日期:2012-09-02 修回日期:2012-12-11 出版日期:2013-03-25 发布日期:2013-01-31
通讯作者: 帅健
作者简介:帅健，男，1963年8月生，1982年获武汉化工学院学士学位，现为中国石油大学（北京）教授、博士生导师，主要从事油气储运安全和工程力学方面的教学与研究工作
基金资助:
国家重大科技专项（2011ZX05017-004-HZ04）资助。

Stress analyses of repaired pipelines by enwinding composite materials

SHUAI Jian 1 　LIU Wei 1,2　 WANG Junqiang 1,3　 ZHANG Yukun 1

Received:2012-09-02 Revised:2012-12-11 Online:2013-03-25 Published:2013-01-31

摘要/Abstract

摘要：

非金属缠绕管道修复是在役管道受损后的一种主要修复方式，对于保障油气管道的平稳安全运行具有十分重要的意义。基于组合薄壁圆筒的力学分析理论，推导出了管道修复厚度的计算公式，并考虑缠绕材料的各向异性建立了缠绕修复管道的有限元分析模型。分析结果表明，缠绕层对附近管体的应力状态影响不大，只要修复厚度和修复长度合适，就能够完全恢复管道的承压能力。缠绕层在管道缺陷区域屈服以后能起到明显的承载作用。增大缠绕层厚度，可降低管道和缠绕层中的环向应力;而当缠绕层厚度小于最小修复厚度时，即使加大修复长度也无法完全恢复管道的承压能力。最后，对基于有限元法和解析方法得到的缠绕层厚度和长度进行了对比，结果表明，缠绕层厚度的计算公式偏于安全，可用于管道修复缠绕层的设计计算。

关键词: 油气管道, 缠绕层, 力学分析, 有限元分析, 修复

Abstract:

The rehabilitation technique of pipelines by enwinding non-metallic materials is a major repair way for the pipeline damaged in service, and it has great significance in ensuring smooth and safe operation for oil and gas pipelines. The mechanical theory on the combination of thin-walled cylinders was applied to deduce a formula for calculating the thickness of the enwinding layer, and a finite element analysis model of pipelines repaired by enwinding non-metallic materials was established based on the consideration of the anisotropy of enwinding materials. The result showed that the enwinding layer has little effect on the stress state of the adjacent pipe section, the loading capacity of the repaired pipeline can be fully recovered as long as the repair thickness and length are suitable. The enwinding layer can play an obvious role in bearing pressure after the pipe defect region yields. Increasing the repair thickness can reduce the hoop stress of both the pipe and the enwinding layer, however, when the enwinding layer thickness is less than the minimum repair thickness, the loading capacity of pipeline cannot be fully restored even the repair length is increased. Finally, the calculation results of the thickness and length of the enwinding layer based on the finite element method and analytical method were compared, which indicates that the calculating formula for the enwinding thickness lays emphasis on safety, and can be used to calculate the enwinding layer in pipeline rehabilitation design.

Key words: oil and gas pipeline, enwinding layer, mechanical analysis, finite element analysis, repair

帅　健刘　惟王俊强张宇坤 . 复合材料缠绕修复管道的应力分析[J]. 石油学报, 2013, 34(2): 372-379.

SHUAI Jian LIU Wei WANG Junqiang ZHANG Yukun . Stress analyses of repaired pipelines by enwinding composite materials[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(2): 372-379.

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复合材料缠绕修复管道的应力分析

Stress analyses of repaired pipelines by enwinding composite materials

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