Modeling of nonlinear electromagnetic phenomena of ship's magnetism

This work concerns the modeling by finite element method of magnetostatic's phenomena occurring in ferromagnetic material and governed by the 2D non-linear equation. It deals with magnetic interaction between the magnetic field produced by an independent source field (land) and ferromagnetic material representing the hull of a ship. The latter is represented by the magnetic curve B(H) deduced from the Rayleigh hysteresis model. The magnetic hysteresis was successfully integrated into the finite element calculation of the field produced by the ferromagnetic shell through the Rayleigh model. A distribution of the magnetic field at any point of the domain resolution is thus obtained and in particular at the vicinities of the ferromagnetic shell. The results of simulation obtained for various orientations of magnetic magnetization were compared, a good agreement was found with the literature.