Contributions of Individual Structural Modes to the Scattered Acoustic Field

Abstract

The frequency behavior of the scattered acoustic field produced by a plane wave impinging on an elastic body immersed in an infinite fluid medium is dominated in certain frequency ranges by large peaks arising from resonant modes in the elastic structure. Computational models have been developed at the Naval Ocean Systems Center for solving these elastic scattering problems. This report shows that the scattered pressure can be represented as a sum of contributions from in vacuo modes of each peak in the overall spectral response of the scattered field. In many cases a small number of modes dominate the response in the vicinity of these peaks. (kr)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1989
Accession Number
ADA219128

Entities

People

  • G. W. Benthien

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Phenomena
  • Acoustic Scattering
  • Acoustics
  • Backscattering
  • Commercial Aircraft
  • Elastic Scattering
  • Equations
  • Frequency
  • Frequency Bands
  • Materials
  • Military Research
  • Modulus Of Elasticity
  • Plane Waves
  • Scattering
  • Universities
  • Waves

Fields of Study

  • Physics

Readers

  • Artificial Intelligence
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Plasma Physics / Magnetohydrodynamics