METHOD OF SELECTION OF CALCULATION PARAMETERS OF PULSE ELECTROMAGNETIC FIELDS

Deals with the issue of determining the parameters of the computational grid when solving problems of mathematical modeling of pulsed electromagnetic fields by the finite element method. The article describes an algorithm for selecting the sizes of finite elements in the numerical implementation of a 3-dimensional mathematical model that describes the time variation of the parameters of a pulsed electromagnetic field. For this purpose, it is proposed to use a comparison of the results of numerical experiments with a well-known analytical solution for simple geometry. It is shown how the parameters of the partitioning of conducting structures can be determined using the Fourier transform of the shape of the current pulse. The regularities of the choice of sizes of finite elements are determined, the use of which in the calculations allows us to adequately describe real electromagnetic processes. In particular, it is shown that for numerical calculations with an error not exceeding 5 % of the analytical solution, the size of the computational grid element should be less than four penetration depths for the cutoff frequencies in the spectrum of the pulse signal. The cutoff frequency of the impulse is determined by 10 % energy criterion.

Authors: V. D. Goncharov, E. G. Evdakova, R. V. Yashkardin

Direction: Electrical Engineering

Keywords: Pulse, electromagnetic field, numerical simulation, parameter selection

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