Uticaj impulsnog magnetnog polja na termičko opterećenje tanke metalne ploče/The Influence of the Impulsiv Magnetic Field on Tempereture Loading of Thin Metallic Plate

Abstract

As meny constructions in power plants work under the influence of the electromagnetic fields, obtaining of Joule’s heat as the thermal loading of the thin metallic plate subjected in homogenius, time changing, impulsiv electromagnetic field is presented in this paper. Direction of the electromagnetic field is normal to the middle surface of the plate. Plate thickness is small compared to the depth of penetration of the magnetic field. Impulsiv changing in the magnetic field is the reason of the conducting currents in the material. The problem is solved in analytical form as the interior Dirichlet boundary problem. Intensity of thermal loading of the plate is obtained in dynamical form by using integral transforms. It depends of electromagnetic characteristics of the material, intensity of exterior magnetic field, impulse’s cycle... Thermal loading is the entrance for furder calculation of the behavior of the plate, which is usualy done by FEM.