engleski

OPTIMIZED TRANSIENT ANALYSIS USING GB-BEM

Transient analysis of the thin wire structures via indirect scheme of the Galerking - Bubnov Boundary Element Method (GB-BEM) is performed using simple optimization techniques for frequency to time domain transformation. The common method of uniform frequency domain sampling combined with Fast Fourier Transform (FFT) is replaced by adaptive frequency domain sampling, combined with simple approximate analytical inverse Fourier transform. The present adaptive sampling method is especially effective for highly resonant geometries where order of magnitude improvements in calculation time can be achieved, when compared with simple uniform sampling. For geometries where high number of frequency samples would be required in inverse FFT, simple approximate analytical inverse Fourier transform, using much lower number of samples obtained during adaptive sampling step, is used thus further improving the overall computational efficiency of the algorithm.

adaptive sampling; Fourier transform; GB-BEM; thin wires; time-domain analysis

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