Finite element analysis of disproportionate regions

Abstract

FINITE ELEMENT ANALYSIS OF DISPROPORTIONATE REGIONS Rumena Stancheva Ilona IatchevaTechnical University of Sofia ABSTRACTThe paper concerns the detailed electromagnetic field calculation in geometrically disproportionate small regions. For example they could be presented by cracks, small air gaps or inhomogeneous inclusions. Unfortunately each of them is possible to be a part of investigated device. In the electrotechnic this is very often encountered problem. The task is interesting in computational aspect mostly as the field values, forces or pressures at this problem region are of important meaning for normal functioning of the device. The similar solution by finite element method would lead either to disproportional dimensions of elements or to huge number of elements. Then the difficulties which have to be overcome are vastly increasing errors or limitations in the computers memory. This impedes the solution of the forward, as well as the coupled and inverse problems in the device. The correct solution is proposed by iteration procedure.