Comparative Study on COMSOL Finite Element Modeling Method of Ship Magnetic Field Based on Scalar Magnetic Potential and Vector Magnetic Potential

Obtaining the magnetic field spatial distribution of ships is necessary for magnetic silencing, and the numerical calculation of magnetic field is an effective method to obtain the magnetic field spatial distribution of ships. In this paper, the effectiveness of ship magnetic field calculation using COMSOL Multiphysics simulation platform is studied, such as the modeling steps and parameter setting methods, and the accuracy of magnetic field calculation based on scalar magnetic potential and vector magnetic potential is compared. Analytical verification examples of rotating ellipsoid shells and numerical examples of submarine engineering are provided. The results show that when using COMSOL for ship magnetic field calculation, the accuracy of vector magnetic potential method is slightly higher than that of scalar magnetic potential method under the same condition, and the modeling accuracy is better than 90%. It is helpful for ship magnetic field numerical calculation.