瞬变电磁法检测埋地金属管道腐蚀模型的ANSYS仿真

为探讨埋地金属管道腐蚀后瞬变电磁场响应,采用二维有限元数值模拟方法研究了不同壁厚埋地金属管道对瞬变电磁场的影响规律;利用ANSYS有限元仿真软件对模型进行了分析计算,考察瞬变电磁场对不同壁厚埋地金属管道的分辨能力。结果表明：埋地金属管道管壁越厚,磁场越强,且随时间增加管壁上磁场强度逐渐减弱;管道壁厚不同时,磁场强度曲线尾支明显分离;瞬变电磁法能有效检测埋地金属管道腐蚀程度并对其进行失效评价。

Simulation of Transient Electromagnetic Method Testing Corrosion of Buried Metal Pipeline by ANSYS

This study investigates the responses of the transient electromagnetic field caused by the corrosion buried metal pipeline.In this research,we adopted two-dimensional（2D） finite element numerical simulation method to research the effect characteristics of various metal pipeline wall thicknesses.The model containing different quantity of metal pipeline wall thickness was designed to test the detectability of the buried metal pipeline.It was simulated by ANSYS software.The simulation results show that the more buried metal pipe wall thickness,the stronger the magnetic field strength,and magnetic field intensity gradually weakened with time increasing.While the pipe wall thickness is different,the magnetic field strength is significantly different in late.The results illustrated that transient electromagnetic method（TEM） is good enough in the buried pipeline corrosion failure exploration.