秦鹏程,熊春宝,李志,翟京生.考虑多腐蚀缺陷作用效应的海底管道失效压力分析[J].表面技术,2020,49(1):237-244.
QIN Peng-cheng,XIONG Chun-bao,LI Zhi,ZHAI Jing-sheng.Failure Pressure Assessment of Submarine Pipelines Considering the Effects of Multiple Corrosion Defects Interaction[J].Surface Technology,2020,49(1):237-244
考虑多腐蚀缺陷作用效应的海底管道失效压力分析
Failure Pressure Assessment of Submarine Pipelines Considering the Effects of Multiple Corrosion Defects Interaction
投稿时间:2019-04-11  修订日期:2020-01-20
DOI:10.16490/j.cnki.issn.1001-3660.2020.01.028
中文关键词:  海底管道  多腐蚀缺陷  有限元分析  失效压力  计算方法
英文关键词:submarine pipeline  multiple corrosion defects  finite element analysis  failure pressure  calculation method
基金项目:国家重点研发计划项目(2016YFC1401203)
作者单位
秦鹏程 天津大学 a.建筑工程学院,天津 300350 
熊春宝 天津大学 a.建筑工程学院,天津 300350 
李志 天津大学 a.建筑工程学院,天津 300350 
翟京生 天津大学 b.海洋科学与技术学院,天津 300350 
AuthorInstitution
QIN Peng-cheng a.School of Civil Engineering, Tianjin University, Tianjin 300350, China 
XIONG Chun-bao a.School of Civil Engineering, Tianjin University, Tianjin 300350, China 
LI Zhi a.School of Civil Engineering, Tianjin University, Tianjin 300350, China 
ZHAI Jing-sheng b.School of Marine Science and Technology, Tianjin University, Tianjin 300350, China 
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中文摘要:
      目的 研究多种腐蚀缺陷及多腐蚀缺陷间相互作用对管道失效的影响,提出考虑多腐蚀缺陷作用效应的管道失效压力计算方法。方法 基于腐蚀缺陷压力管道全尺寸压力爆破试验数据,采用有限元方法分析含不同尺寸多腐蚀缺陷的管道失效压力,提出重叠腐蚀缺陷相互作用系数概念,并将其应用到重叠腐蚀缺陷管道失效压力的计算中。结果 腐蚀缺陷间不同的轴向间距及环向间距均对多腐蚀缺陷相互作用有显著影响,从而影响管道失效压力。多腐蚀缺陷间相互作用存在临界范围,且不同腐蚀缺陷尺寸对其相互作用临界值影响不同。当管道存在“十”字形重叠腐蚀缺陷时,失效压力明显降低。重叠腐蚀缺陷顶层缺陷的几何尺寸是决定失效压力变化趋势的主要原因,即随着顶层腐蚀缺陷轴向长度及深度的增加,失效压力出现大幅降低;而随着顶层缺陷宽度的增加,失效压力下降趋势缓慢。结论 腐蚀缺陷几何尺寸是影响管道失效压力及腐蚀缺陷间相互作用的重要因素,结合腐蚀缺陷间相互作用系数能够有效进行多腐蚀缺陷管道的失效压力分析计算。
英文摘要:
      The paper aims to study the influences of various corrosion defects and the interaction of multiple corrosion defects on pipeline failure, and propose a calculation method of pipeline failure pressure considering the effect of multiple corrosion defects. Based on data of the full-scale pressure burst tests of pressure pipelines with corrosion defects, the failure pressure of pipelines with multiple corrosion defects was analyzed with the finite element method. The concept of interaction coefficient of overlapping corrosion defects was proposed and applied to the calculation of pipeline failure pressure with overlapping corrosion defects. The results revealed that different longitudinal spacing and circumferential spacing of corrosion defects had a significant effect on the interaction of multiple corrosion defects, which affected the failure pressure of pipelines. There was a critical range for the interaction of multiple corrosion defects, and different sizes of corrosion defect also affected their interaction critical values. When there was an overlapping corrosion defect with “+” shape in the pipeline, the failure pressure was significantly reduced; the top defect geometry of overlapping corrosion defect was a main reason for determining the trend of the failure pressure, that was, the failure pressure decreased greatly with the increase of longitudinal length and depth of the top corrosion defect; while as the width of the top defect increased, the failure pressure decreased slowly. The geometrical size of corrosion defects is an important factor affecting the interaction of multiple corrosion defects and the pipeline failure pressure. Considering the interaction coefficient of multiple corrosion defects, the failure pressure analysis of multiple corrosion pipelines can be effectively performed.
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