Simulation Of Transient Electromagnetic Method Testing Corrosion Of Buried Metal Pipeline By ANSYS

Transient electromagnetic method (TEM) is one of mainly testing method forburied metal pipeline corrosion. This technique has many advantages: high resolution,simple, rich information, etc. It can realize the not excavation in service detection, but atpresent the main development of basic theory and data interpretation lag behind, so it isone of the urgent problem. The article adopted finite element numerical simulationmethod to research the effect characteristics of various metal pipeline wall thicknesses.It provided theoretical basis for inversion interpretation.The article deducted the equation of transient electromagnetic method testingcorrosion of buried metal as the theory basis of numerical simulation. The researchadopted ANSYS software modeling2D、3D various metal pipeline wall thicknessesmodel. The2D、3D simulation results show that responses of metal pipeline in or notunderground is obviously different; The2D simulation results show that while the pipewall thickness is different, the magnetic field strength is significantly different in late.The3D simulation results show that while turned off the signal, magnetic field intensityof the pipe wall just below the coil is the strongest, then diffusions to the both ends ofthe pipeline. At last, magnetic field intensity of the middle part is weakest, the both endis the strongest. While the pipe wall thickness is different, the magnetic field strength issignificantly different in late. The last article artificial two kinds of transient metalpipeline corrosion, and use TEM testing them, the results are similar to the conclusion,thus validating the simulation results are accurate, credible. The results of researchillustrated that transient electromagnetic method is good enough in the buried pipelinecorrosion failure exploration.