复合缺陷管道爆破失效研究  

Analysis of Blasting Failure of Submarine Composite Defective Pipeline

作　　者：敖建华 刘潇[1] AO Jianhua;LIU Xiao(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,Liaoning 110179;Marine Engineering and Environmental Research Center,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110179 [2]中国科学院武汉岩土力学研究所海洋工程与环境研究中心,湖北武汉430071

出　　处：《水利与建筑工程学报》2025年第2期139-148,177,共11页Journal of Water Resources and Architectural Engineering

基　　金：近海能源工程结构系统安全科学平台关键技术研究[广西科技厅重大专项(GUIKE AB22080073)]。

摘　　要：为了研究海底管道服役期间在高压环境下内外复合腐蚀缺陷管道的爆破失效机理,采用经过试验数据验证的有限元方法,分析不同腐蚀缺陷形式对管道爆破失效的影响。结果表明:API-5L-X52、API-5L-X60、API-5L-X65、API-5L-X70、API-5L-X80五种不同管材的缺陷管道的临界爆破压力随着管道缺陷深度和缺陷长度的增加逐渐减小。缺陷角度、缺陷宽度对缺陷管道的临界爆破压力无明显贡献,其中X52管道对缺陷尺度变化最为敏感。内外复合缺陷管道的爆破压力则大多介于单一外缺陷和单一内缺陷之间。三种不同类型缺陷的临界爆破压力大小顺序为:P_(外)>P_(复合)>P_(内)。复合缺陷管道爆破压力和外缺陷与内缺陷深度之比呈正相关,与内缺陷与外缺陷的长度比值呈负相关。随着复合腐蚀缺陷中的内外腐蚀缺陷的轴向间距和环向间距增大,复合缺陷管道的承载能力增强。Submarine pipelines are important part of the offshore oil and gas gathering,transportation,storage and transportation system.During their service,internal and external corrosion defects will inevitably occur due to the marine environment and transportation medium,and they often do not appear in a single form.In the high-pressure environment,corrosion defect pipelines are prone to burst failure,so it is particularly important to study the burst failure mechanism of internal and external composite corrosion defect pipelines.The finite element method verified by experimental data is used to analyze the influence of different corrosion defect forms on pipeline blasting failure under internal and external pressure differential loads.The results show that the critical burst pressure of the defective pipelines of five different type materials,namely API-5L-X52,API-5L-X60,API-5L-X65,API-5L-X70 and API-5L-X80,gradually decreases with the increase of the defect depth and defect length of the pipelines.The defect angle and defect width have no significant contribution to the critical bursting pressure of the defective pipeline,and the X52 pipeline is the most sensitive to the change of defect scale.The burst pressure of the internal and external composite defect pipes is mostly between a single external defect and a single internal defect.The order of critical burst pressure for the three different types of defects is as follows:P_(outside)>P_(composite)>P_(inside).There is a positive correlation between the burst pressure of the composite defect and the ratio of the depth of the external defect to the internal defect,and a negative correlation with the ratio of the length of the internal defect to the external defect.With the increase of axial and circumferential spacing of internal and external corrosion defects in composite corrosion defects,the bearing capacity of composite defect pipelines increases.

关 键 词：海底管道 有限元 复合缺陷 爆破失效 ABAQUS 

分 类 号：TE988[石油与天然气工程—石油机械设备]