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• W2101472873 abstract "In this work the source simulation technique was used tocalculate the scattering of a plane wave by a cylinder with radial or ellipticaltransverse section. The basic idea of the source simulation technique is toreplace the scattering (or radiating) body with a system of simple sourceslocated within the envelope of the scatterer (or radiator). The extent to whichthe simulated field reproduces the original one depends on the degree ofcorrespondence between the simulated and the given boundary conditions.Numerical simulations have shown that: 1) the shape of the auxiliary surface; 2)the number of sources, and 3) the way the sources are distributed are the mostrelevant parameters to ensure an accurate solution of the problem. In the caseof the single-layer method, the sources should not be positioned close to thesurface or to the center of the body, because the problem becomesill-conditioned. The auxiliary surface and the acatterer should be as similar aspossible in order to minimize the boundary error. With respect to the number ofsources (N), there are two opposite effects: 1) if (N) is toosmall, the sound field is not reproduced accurately; 2) if (N) is toolarge, the computing time increases and the solution accuracy decreases. Themethod breaks down when the excitation frequency coincides with theeigenfrequenciec - a narrow range of frequencies - of the space formed by theauxiliary surface. As the auxiliary surface is frequently represented by simplesurfaces (cylinder, sphere), one can easily calculate the eigenfrequencies andtherefore avoid them." @default.
• W2101472873 created "2016-06-24" @default.
• W2101472873 creator A5053818100 @default.
• W2101472873 date "2000-01-01" @default.
• W2101472873 modified "2023-09-26" @default.
• W2101472873 title "Factors that influence the calculation of acoustic scattering by the methodof source simulation" @default.
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