Three-dimensional finite element analysis of magnetic flux leakage signals caused by transmission pipeline complex corrosion
Three-dimensional finite element analysis of magnetic flux leakage signals caused by transmission pipeline complex corrosion
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DOI：
10.1627/jpi.48.314
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发表时间：
2005-09-01
影响因子：
1
通讯作者：
Jin, T
中科院分区：
文献类型：
--
作者：
Chen, L;Que, PW;Jin, T
最常用且最具成本效益的输油管道无损检测 (NDT) 方法是利用漏磁 (MFL) 技术。腐蚀坑数量多且形状复杂，用实验方法研究漏磁测试的变化规律非常困难。有限元分析 (FEA) 已用于研究 MFL 信号。我们使用三维有限元分析来模拟复杂腐蚀对不存在几何缺陷的钢板 MFL 信号的影响。我们从模拟缺陷的有限元结构建模中得出了复杂的腐蚀模式。使用 FEA 描述和计算了四种复杂腐蚀的 MFL。结果表明，复杂腐蚀坑的相对位置对MFL信号的幅度影响显着。更好地理解这些效应将有助于解释传输管道 NDT 中的 MFL 信号。
The most commonly used and cost effective method of transmission pipeline non destructive testing (NDT) utilizes the magnetic flux leakage (MFL) technique. The corrosion pits occur in many and complex shapes, so it is very difficult to research variety rules in MFL testing using experimental methods. Finite element analysis (FEA) has been used to study MFL signals. We used three-dimensional FEA to simulate the effect of complex corrosion on MFL signals from a steel plate in the absence of a geometrical defect. We derived the complex corrosion patterns from finite-element structural modeling of simulated defects. MFL for four complex corrosions was described and calculated using FEA. The results show that the relative position of the complex corrosion pits affects the magnitude of the MFL signal significantly. Better understanding of these effects will be helpful for interpreting the MFL signals in transmission pipeline NDT.