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Reliability analysis of corroded subsea pipeline
Author(s): 
Pages: 516-520
Year: Issue:  4
Journal: Acta Petrolei Sinica

Keyword:  corroded submarine pipelinereliabilityoverlaying soil effectseismic loadresidual stress effect;
Abstract: 为了计算海底管道在腐蚀作用下的可靠性,研究了海底管道在正常服役阶段可能受到的荷载作用,包括内压、温度、弯曲、覆土、地震作用和残余应力作用.基于Monte Carlo方法结合算例,计算了腐蚀海底管道在这些作用下的可靠性,得到了失效概率随时间的变化曲线.同时,研究了这6种作用对腐蚀海底管道的影响,描述了各种作用对腐蚀海底管道的影响程度.从影响腐蚀海底管道失效概率的角度,定义了参数灵敏性指标,对海底管道设计中经常涉及的参数如操作压力、管道半径、管壁厚度和管线埋设深度等进行了灵敏性分析,讨论了其变化对管线失效概率的影响,为实际工程中对腐蚀海底管道进行可靠性分析提供了参考.
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