[1]王琪,周云,陈岑.含裂纹油气管道CFRP修复数值研究[J].石油化工设备,2024,53(02):23-31.[doi:10.3969/j.issn.1000-7466.2024.02.004]
　WANG Qi,ZHOU Yun,CHEN Cen.Numerical Study of CFRP Repairing for Oil and Gas Pipelines with Cracks[J].Petro-Chemical Equipment,2024,53(02):23-31.[doi:10.3969/j.issn.1000-7466.2024.02.004]
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含裂纹油气管道CFRP修复数值研究()
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石油化工设备[ISSN:1000-7466/CN:62-1078/TQ]

卷:
53
期数:
2024年02期
页码:
23-31
栏目:
试验研究
出版日期:
2024-03-25

文章信息/Info

Title:
Numerical Study of CFRP Repairing for Oil and Gas Pipelines with Cracks
文章编号:
1000-7466(2024)02-0023-09
作者:
王琪; 周云; 陈岑
（江苏省特种设备安全监督检验研究院，江苏 南京 210036）
Author(s):
WANG Qi; ZHOU Yun; CHEN Cen
（Special Equipment Safety Supervision Inspection Institute of Jiangsu Province，Nanjing 210036，China）
关键词:
管道; 裂纹; 复合材料; 修复; 数值分析
Keywords:
pipe; crack; composite material; repair; numerical analysis
分类号:
TQ055.8；TE973
DOI:
10.3969/j.issn.1000-7466.2024.02.004
文献标志码:
A
摘要:
裂纹缺陷引发的管道强度下降是埋地油气管道的主要事故原因之一，而高强度、高模量、耐腐蚀的碳纤维增强树脂基复合材料（CFRP）可以很好地缠绕修复缺陷管段。针对有/无CFRP修复20钢含矩形裂纹缺陷管道，采用ANSYS有限元软件模拟内压载荷作用下含裂纹管道修复前后的响应过程，分析了裂纹角度、裂纹长度、裂纹深度、修复长度及修复厚度等参数对含裂纹管道强度的影响规律。研究表明，含裂纹管道的最大Mises等效应力随着裂纹与管道轴向夹角的减小、裂纹长度和深度的增大而增大，内压的增大加剧了缺陷参数对管道强度的影响程度。在工程中要严格控制裂纹在深度和长度方向的扩展，在内部减压后再维修含裂纹管道。CFRP修复厚度是修复后含裂纹管道强度的主要影响因素，随着修复厚度一定程度的增大，含裂纹管道最大Mises等效应力呈线性下降。
Abstract:
The strength decline caused by cracks is one of the main causes of accidents in underground oil and gas pipelines，and the high strength，high modulus and corrosion-resistant carbon fiber reinforced resin matrix composite（CFRP） can be well wound to repair the defective pipe segment. Aiming at the 20 steel rectangular crack defect pipeline repaired with or without CFRP，the response process of the cracked pipeline before and after repair under internal pressure load was simulated by ANSYS finite element software，and the influence of crack angle， crack length，crack depth，repair length，repair thickness and other parameters on the strength of cracked pipeline were analyzed. The results show that the maximum Mises equivalent stress of cracked pipeline increases with the decrease of the angle between crack and pipe axis and the increase of crack length and depth. The increase of internal pressure load aggravates the influence degree of defect parameters on pipeline strength. In engineering，the propagation of crack in depth and length direction should be strictly controlled，and the cracked pipeline should not be maintained until internal decompression. The thickness of CFRP repair is the main factor affecting the strength of the cracked pipeline after repair. The maximum Mises equivalent stress of the cracked pipe decreases linearly as the repair thickness increases to a certain extent.

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备注/Memo

备注/Memo:
收稿日期： 2023-10-15 作者简介： 王 琪（1984-），女，江苏盐城人，高级工程师，硕士，主要从事特种设备检验工作。
更新日期/Last Update: 2024-04-01