Computation of modal decompositions for studying electromagnetic induction

Author

McFadden, Michael ; Scott, Waymond R., Jr.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

fYear

2012

fDate

22-27 July 2012

Firstpage

570

Lastpage

573

Abstract

In this paper, a numerical method for calculating the wideband, low-frequency, eddy-current response of a metallic body-of-revolution is described. Solutions are given in a modal decomposition that can be related to the discrete spectrum of relaxation frequencies and the measured magnetic polarizability dyadic. Calculated responses are compared with the analytically known solution for a sphere and measured responses for a cylinder. A graph of the relaxation frequencies and moments for the two most dominant modes in a cylinder, given as a function of aspect ratio, is provided.

Keywords

eddy currents; electromagnetic induction; geophysical techniques; polarisability; aspect ratio; discrete spectrum; electromagnetic induction; magnetic polarizability dyadic; metallic body-of-revolution; modal decomposition; numerical method; relaxation frequencies; wideband low-frequency eddy-current response; Eddy currents; Eigenvalues and eigenfunctions; Equations; Finite element methods; Frequency measurement; Scattering; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International

Conference_Location

Munich

ISSN

2153-6996

Print_ISBN

978-1-4673-1160-1

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2012.6351529

Filename

6351529