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The transition matrix method for a 2D eddy current interaction problem

Lars Larsson (Institutionen för material- och tillverkningsteknik, Avancerad oförstörande provning) ; Anders Rosell (Institutionen för material- och tillverkningsteknik, Avancerad oförstörande provning)
AIP Conf. Proc. 1430; (ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. vol 31; 17–22 July 2011; Burlington, VT) (1551-7616). Vol. 1430 (2012), p. 316-323.
[Konferensbidrag, refereegranskat]

A 2D model of the eddy current interaction problem that consists of an inhomogeneity in a conductive half space is presented. The applied analytical method of solution is the transition (T) matrix method. This involves use of the free space Green’s function to generate a system of boundary integral relations. In this way, it is easy to identify the contributions to the total solution from each different scattering surface. The different parts are separated also in the computation of the impedance. This leads to low cost simulations in terms of computation time and qualify the method to be used to obtain probability of detection (POD) curves. The T matrix method is a building block method and the possibility to extend the geometry with several inhomogeneities and extra layers will be discussed. The model is compared with a Finite Element (FE) model and numerical examples for the case with a cylindrical inhomogeneity are given.



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Denna post skapades 2012-01-04. Senast ändrad 2015-07-02.
CPL Pubid: 151650

 

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