掺氢环境下含腐蚀缺陷X52天然气管道的结构强度失效机理研究  

Structural strength failure mechanism of X52 natural gas pipeline with corrosion defects under hydrogen-blended environment

作　　者：曹宇 陈鹏[1] 杨建功[3] 王德强 白勇 CAO Yu;CHEN Peng;YANG Jiangong;WANG Deqiang;BAI Yong(College of Engineering,Shanghai Ocean University,Shanghai 201306,China;State Key Laboratory of Structural Analysis of Industrial Equipment,Dalian University of Technology,Dalian 116081,China;Ordos Carbon Neutralization Research and Application Co.Ltd.,Ordos 017000,China;Inner Mongolia Western Natural Gas Co.Ltd.,Ordos 017000,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]上海海洋大学工程学院,上海201306 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116081 [3]鄂尔多斯碳中和研究院,内蒙古鄂尔多斯017000 [4]内蒙古西部天然气股份有限公司,内蒙古鄂尔多斯017000 [5]浙江大学建筑工程学院,浙江杭州310058

出　　处：《中国舰船研究》2024年第4期186-192,共7页Chinese Journal of Ship Research

基　　金：大连理工大学工业装备结构分析国家重点实验室开放课题基金资助项目(GZ22113)。

摘　　要：[目的]旨在探究掺氢环境下含腐蚀缺陷管道的结构强度劣化规律。[方法]基于试验数据分析X52钢在不同掺氢比例下的承载性能,采用非线性有限元方法研究X52掺氢天然气管道在不同腐蚀缺陷下的结构强度失效机理。[结果]研究结果表明:掺氢比例增大到50.0%时,管道在组合载荷下达到失效的位移最小为2.58 mm,结构韧性劣化程度较大;掺氢比例为25.0%时,缺陷深度越大,结构失效程度越严重,通过对正方形和圆形缺陷的对比,发现正方形缺陷的最大应力高于圆形缺陷。[结论]基于材料性能构建的含缺陷管道模型能够实现对不同掺氢环境下天然气管道服役状态结构承载力劣化程度的评估,所做研究可为新能源管道设计及健康监测提供工程化建议。[Objective]This study aims to explore the structural strength deterioration mechanism of pipelines with corrosion defects in hydrogen-blended environments.[Methods]Based on the experimental data,an analysis is made of the load bearing performance of X52 steel under different levels of hydrogen blending,and the structural strength failure mechanism of an X52 hydrogen-blended natural gas pipeline under different corrosion defects is described using the nonlinear finite element method.[Results]When the hydrogen blend level increases to 50.0%,under a combined load,the pipeline reaches minimum displacement failure at 2.58 mm,and the structural toughness deteriorates to a greater degree;at a hydrogen blend level of 25.0%,the defect depth is greater and the degree of structural failure more serious;comparing square and circular defects,the maximum stress of the square defects is higher than that of the circular defects.[Conclusions]The material property-based defective pipeline model can realize the assessment of the structural bearing capacity deterioration of natural gas pipelines under different hydrogen-blending conditions,providing engineering suggestions for the design and health monitoring of new energy pipelines.

关 键 词：氢能 掺氢天然气管道 腐蚀缺陷 非线性有限元方法 劣化程度 

分 类 号：U663.9[交通运输工程—船舶及航道工程]