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Application of 3-D FEM in the simulation analysis for MFL signals

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The analysis of the magnetic flux leakage (MFL) signals is the basis of MFL testing. The magnetic flux leakage (MFL) of defects in pipes is simulated by using a three-dimensional (3-D) finite element method (FEM). The 3-D FEM model is built on the principle of magnetic flux leakage (MFL) testing. The distribution of magnetic flux density is obtained. The relationship between defect geometry parameter and MFL signals is discussed in detail; the influence of path station lift-off value and intensity of magnetisation is also studied in this paper. It is the basis for optimising the design of the magnetic detecting equipment and the quantitative testing of MFL.

Keywords: 3-D finite element; Magnetic flux leakage testing; magnetic flux density; simulation analysis

Document Type: Research Article

DOI: http://dx.doi.org/10.1784/insi.2009.51.1.32

Affiliations: Department of Electrical Engineering, Mechanical Engineering College, Hebei Shijiazhuang 050005, People's Republic of China.

Publication date: January 1, 2009

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