Author(s)

P. Allan & A. Watt

Abstract

Modelling the corrosion of marine vessels is a semi-infinite domain problem, with a large continuous volume. The BEM is the most suitable numerical method for calculating the electric potential and its normal derivative on the boundary from Laplace’s Equation. With these known, it is possible to calculate the electric and magnetic fields due to corrosion, providing an insight into the level of corrosion protection provided and the detectability of the vessel to underwater threats. An innovative method has been developed for integrating the fundamental solution using triangular elements. This consists of performing the integrals by forming polynomials in which the variables are the moments of the element. By extracting the dimensions from the calculations of the moments, they can be calculated using normalised moments

Keywords