<p><i>A two-dimensional reflection acoustic grating is considered. A method for approximate computation of the scattering matrix describing the scattering of plane waves on the periodic boundary of this grating is formulated and justified. To this end, the problem on the grating is reduced to a problem in an auxiliary waveguide. The known method for computing waveguide scattering matrices is expanded to the obtained waveguide. The suggested method is not influenced by surface waves in the grating. Bibliography:</i> 9 <i>titles.</i></p>

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A METHOD FOR APPROXIMATE COMPUTATION OF SCATTERING MATRIX IN ACOUSTIC DIFFRACTION GRATINGS

  • A. S. Poretskii,
  • B. A. Plamenevskii,
  • O. V. Sarafanov

摘要

A two-dimensional reflection acoustic grating is considered. A method for approximate computation of the scattering matrix describing the scattering of plane waves on the periodic boundary of this grating is formulated and justified. To this end, the problem on the grating is reduced to a problem in an auxiliary waveguide. The known method for computing waveguide scattering matrices is expanded to the obtained waveguide. The suggested method is not influenced by surface waves in the grating. Bibliography: 9 titles.