TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Boundary conditions of variable magnetic field compensation for a thin ferromagnetic shell



Full text article ( in russian)

Year

 
2019

Issue

 
389

Volume

 
3

Pages

 
139-143

Caption

 
Boundary conditions of variable magnetic field compensation for a thin ferromagnetic shell

Authors

 
Lapovok A., Polutov A.

Keywords

 
low frequency magnetic field, thin ferromagnetic shells, boundary conditions, compensation conditions.

DOI

 
10.24937/2542-2324-2019-3-389-139-143

Summary

 
Object and purpose of research. The purpose of this work was to formulate boundary conditions for density calculations of current sheet compensating low frequency magnetic field of ferromagnetic shell
Subject matter and methods.Numerical and analytical solution methods for boundary value problems of electromagnetic field theory
Main results. This paper discusses external electromagnetic field compensation of a thin ferromagnetic conductive shell by means of the current sheet on its outer or inner side. For a closed shell, compensating current density is calculated through the solution of internal boundary value problem for a vector magnetic potential with Dirichlet or third kind boundary conditions
Conclusion. The results of this work could be used in development of degaussing device for compensation of the eddy current-induced magnetic field during ship roll. Compensating current must be adjusted with respect to three parameters: Earth magnetic field in ship-axes coordinate system, and two time derivatives of the external field (the first and the second).

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ISSN (print) 2542-2324 / ISSN (online) 2618-8244

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