Navegando por Assunto "Solos dispersivos"

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Um método para modelagem numérica plena da dispersão elétrica do solo usando aproximadores de padé e o método das diferenças finitas no domínio do tempo
(Universidade Federal do Pará, 2016-02-29) NASCIMENTO, Júlio Antônio Salheb do; OLIVEIRA, Rodrigo Melo e Silva de; http://lattes.cnpq.br/4768904697900863
In this dissertation, it is developed and implemented a numerical method for modeling the soil electrical dispersion using the Finite-Dierence Time-Domain method (FDTD). The methodology is based on the application of Padé approximants in frequency domain, in such a way to represent the spectral dependency of soil's conductivity and electrical permittivity. The time domain equations are obtained using simple algebraic operations and inverse Fourier transforms. Experimental results for grounding systems subjected to articial lightning pulses are compared with numerical results obtained using the proposed method. It was observed an excellent agreement between the corresponding transient signals.