地表载荷作用下含缺陷燃气管道安全评价*

doi:10.16265/j.cnki.issn1003-3033.2021.10.018

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (10): 127-135.doi: 10.16265/j.cnki.issn1003-3033.2021.10.018

地表载荷作用下含缺陷燃气管道安全评价^*

刘啸奔副教授, 王宝栋, 张东, 张宏教授

中国石油大学(北京) 油气管道输送安全国家工程实验室/石油工程教育部重点实验室/北京城市油气输送技术重点实验室,北京 102249

收稿日期:2021-07-10 修回日期:2021-09-12 出版日期:2021-10-28 发布日期:2022-04-28
作者简介:刘啸奔 (1991—),男,江苏如皋人,博士,副教授,主要从事油气管道结构安全与完整性评价方面的教学与研究。E-mail: xiaobenliu@cup.edu.cn。
基金资助:
国家自然科学基金资助(52004314);北京市自然科学基金资助(8214053);新疆自治区天山青年计划项目(2019Q088);中国石油大学(北京)青年拔尖人才科研启动基金资助(2462018YJRC019)。

Safety evaluation of gas pipelines with defects under surface load

LIU Xiaoben, WANG Baodong, ZHANG Dong, ZHANG Hong

National Engineering Laboratory for Pipeline Safety/ MOE Key Laboratory of Petroleum Engineering/Beijing Key Laboratory of Oil and Gas Transfer Technology, China University of Petroleum-Beijing, Beijing 102249, China

Received:2021-07-10 Revised:2021-09-12 Online:2021-10-28 Published:2022-04-28

摘要/Abstract

摘要： 为探究地表载荷作用下含缺陷燃气管道的力学性能与失效行为,提出含缺陷燃气管道安全评价方法,利用ANSYS非线性有限元软件,建立地表载荷作用下含体积型缺陷燃气管道的管土相互作用模型,揭示含缺陷燃气管道在地表载荷作用下的失效机制,分析内压载荷、缺陷位置、缺陷深度和缺陷长度等参数对管道失效过程的影响。结果表明:地表载荷作用下含缺陷燃气管道由于管道缺陷处与左右两侧起拱线处的Mises应力超过管材屈服强度而发生失效;内压载荷、缺陷位置与缺陷深度对管道临界失效载荷有直接影响;缺陷位于0°时管道在地表载荷作用下更容易发生失效;通过计算组合工况下管道临界失效载荷能够得到地表载荷作用下含缺陷燃气管道安全评定曲线。

关键词: 地表载荷, 燃气管道, 体积型缺陷, 安全评价, 安全评定曲线

Abstract: In order to study mechanical properties and failure behavior of gas pipelines with defects under surface load, a safety evaluation method for them was proposed. Firstly, a pipe-soil interaction model for gas pipelines with volume defects under surface load was established by utilizing general nonlinear finite element software ANSYS. Then, their failure mechanism under the load was revealed, and impacts of parameters, such as internal pressure, defect location, defect depth and length, on failure process were analyzed. The results show that these gas pipelines with defects fail under surface load since Mises stress at defect position and arching line position at both sides exceeds yield limit. Factors like internal pressure, defect location, defect depth will directly affect critical failure load of pipelines, and they are prone to fail at 0° position. Moreover, their safety evaluation curve can be obtained by calculating critical failure load under combined working conditions.

Key words: surface load, gas pipeline, volume type defect, safety evaluation, safety evaluation curve

中图分类号:

X944

刘啸奔, 王宝栋, 张东, 张宏. 地表载荷作用下含缺陷燃气管道安全评价^*[J]. 中国安全科学学报, 2021, 31(10): 127-135.

LIU Xiaoben, WANG Baodong, ZHANG Dong, ZHANG Hong. Safety evaluation of gas pipelines with defects under surface load[J]. China Safety Science Journal, 2021, 31(10): 127-135.

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地表载荷作用下含缺陷燃气管道安全评价^*

Safety evaluation of gas pipelines with defects under surface load

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