Abstract
Numerical simulation methods are described for the spectral characteristics of an acoustic signal scattered by multiscale surface waves. The methods include the algorithms for calculating the scattered field by the Kirchhoff method and with the use of an integral equation, as well as the algorithms of surface waves generation with allowance for nonlinear hydrodynamic effects. The paper focuses on studying the spectrum of Bragg scattering caused by surface waves whose frequency exceeds the fundamental low-frequency component of the surface waves by several octaves. The spectrum broadening of the backscattered signal is estimated. The possibility of extending the range of applicability of the computing method developed under small perturbation conditions to cases characterized by a Rayleigh parameter of ≥1 is estimated.
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Original Russian Text © M.B. Salin, A.S. Dosaev, A.I. Konkov, B.M. Salin, 2014, published in Akusticheskii Zhurnal, 2014, Vol. 60, No. 4, pp. 413–425.
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Salin, M.B., Dosaev, A.S., Konkov, A.I. et al. Numerical simulation of Bragg scattering of sound by surface roughness for different values of the Rayleigh parameter. Acoust. Phys. 60, 442–454 (2014). https://doi.org/10.1134/S1063771014040186
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DOI: https://doi.org/10.1134/S1063771014040186