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PE approximations for scattering from a rough surface / D.J. Thomson, G.H. Brooke & E.S. Holmes. : DR52-11/27-1995E-PDF

"Two methods are presented for incorporating the effects of rough boundaries into propagation models based on the parabolic equation (PE) approximation. In particular, the acoustic scattering by a deterministically-rough, pressure-release surface is considered. In the first method, the vertical extent of the computational cell adjacent to the rough boundary is allowed to vary with range. This non-standard grid approach can readily be incorporated into existing finite-difference PE codes. In the second method, a low-impedance air-layer backing is appended to the rough surface and the original rough-surface scattering problem is replaced by one involving scattering from an internal, water/air interface. In this case, both finite-difference and split-step marching algorithms can be accommodated. Numerical results for the forward-scattered component of the field are provided for two benchmark problems"--Abstract (page 1).

Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.953879&sl=1

Renseignements sur la publication
Ministère/Organisme
  • Defence Research Establishment Pacific, issuing body.
  • Canada. Department of National Defence. Research and Development Branch, issuing body.
TitrePE approximations for scattering from a rough surface / D.J. Thomson, G.H. Brooke & E.S. Holmes.
Titre de la série
  • Technical memorandum ; 95-21
Type de publicationMonographie - Voir l'enregistrement principal
Langue[Anglais]
FormatTexte numérique
Document électronique
Note(s)
  • Digitized edition from print [produced by Defence Research and Development Canada].
  • Includes bibliographical references (pages 18-19).
Information sur la publication
  • Victoria, B.C. : Defence Research Establishment Pacific = Centre de recherches pour la défense pacifique : Research and Development Branch, Department of National Defence, March 1995.
Auteur / Contributeur
  • Thomson, D. J.(Douglas John)author.
Description1 online resource (19 pages, 3 unnumbered pages) : illustrations, charts.
Numéro de catalogue
  • DR52-11/27-1995E-PDF
Descripteurs
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