Effects of 3D Eddy Current Finite Element Formulations on ECT Signals

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To obtain the simulated eddy current testing (ECT) signals of steam generator (SG) in nuclear power plant (NPP), nodal-based finite element (FE) analysis with magnetic vector potential (MVP) is usually used. To perform the numerical analysis, we derive the governing equation in terms of MVP and electric scalar potential (ESP) from Maxwell’s equations. To insure the uniqueness of solution, gauge condition has to be considered. In eddy current problems, Coulomb gauge condition (CGC) is usually used. In 2-D or 3-D axis-symmetric analysis, CGC is included during formulation and ESP is eliminated using some special assumption. Because CGC is not used during the formulation in 3-D analysis, we have to include artificially. And because of the heavy computation cost for 3-D analysis modified magnetic vector potential (MMVP) is used by elimination ESP. In this paper, effects of artificial treatment of CGC and elimination of ESP on ECT signal are investigated in order to help for obtaining accurate numerical simulation results.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

464-467

DOI:

10.4028/www.scientific.net/KEM.321-323.464

Citation:

H. B. Lee "Effects of 3D Eddy Current Finite Element Formulations on ECT Signals", Key Engineering Materials, Vols. 321-323, pp. 464-467, 2006

Online since:

October 2006

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$35.00

[1] C. R. I. Emson and J. Somkin, An optimal method for 3-D eddy currents, IEEE Trans. on Mag., Vol. 19 (1983), No. 6.

[2] C. F. Bryant, C. R. I. Emson and C. W. Trowbridge, A comparison of Lorentz gauge formulations in eddy current computations, IEEE Trans. on Mag., Vol. 26 (1990), No. 2.

DOI: 10.1109/20.106345

[3] O. Biro and K. Preis, On the use of the magnetic vector potential in the finite element analysis of three-dimensional eddy currents, IEEE Trans. on Mag., Vol. 25 (1989), No. 4, pp.3145-3159.

DOI: 10.1109/20.34388

[4] David K. Cheng, Fundamentals of engineering electromagnetics, Prentice Hall (1992).

[5] N. N. Rao, Elements of engineering electromagnetics, 5th ed., Prentice Hall, (1999). -5.

[5] -5.

[5] [0] 2000 4000 6000 8000 10000 12000 X [mm] Y [mm] Difference Impedance [Ohm] -5.

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[5] [0] 1000 2000 3000 4000 5000 X [mm] Y [mm] Difference Impedance [Ohm] -5.

[5] -5.

[5] [0] 5000 10000 15000 X [mm] Y [mm] Difference Impedance [Ohm] -5.

[5] -5.

[5] [0] 5000 10000 15000 X [mm] Y [mm] Difference Impedance [Ohm].

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