摘要
提出一种油气管道裂纹漏磁场检测的数学分析方法。先根据麦克斯韦方程组推导出漏磁场数据分析模型。其次,利用三维有限元分析原理在Ansys环境下建立数学仿真模型。再将仿真结果与实际测试数据进行比较,确定该方法的可靠性。最后,通过仿真分析得出了裂纹几何参数(深度和宽度等)对漏磁信号特征的影响规律,并给出它们的关系曲线。该方法为实际利用漏磁场分布检测油气管道裂纹提供了重要的依据。
A mathematical analysis method of magnetic flux leakage(MFL)testing in pipeline s cracks was proposed.In this method,firstly,the mathematical analysis model for MLF was derived based on the Maxwell s equations.Then,smulation model was established under Ansys environment based on the 3D finite element(FE)theory.Furthermore,numerical simulation of MFL was made and agreed well with the actual experimental data.Finally,the effect of cracks geometric parameter,such as depth,width and so on.On the MFL signal char...
出处
《无损检测》
北大核心
2008年第9期590-593,607,共5页
Nondestructive Testing
关键词
漏磁检测
有限元
裂纹
仿真分析
Magnetic flux leakage testing
Finite element
Cracks
Simulation analysis
