Three-Dimensional Angular Distributions of Acoustic Scattering from Flexural and Rayleigh Resonances of Elastic Spheroidal Targets

Abstract

Three-dimensional angular distributions of acoustic scattering strength arising from flexural and Rayleigh resonances of a prolate steel spheroid are presented. Flexural resonances are found to produce strong scattering into four almost symmetrical lobes, by as much as 20 dB above the nonresonant background. Rayleigh resonances are weaker, but significant portions of the scattered Rayleigh energy are radiated into steep angles. In both cases, considerable interactions of the scattered energy with waveguide boundaries may be expected.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1991
Accession Number
ADA247660

Entities

People

  • Jacob A George
  • M. F. Werby

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Acoustic Waves
  • Aspect Ratio
  • Boundaries
  • Coordinate Systems
  • Differential Equations
  • Elastic Waves
  • Equations
  • Excitation
  • Frequency
  • Frequency Domain
  • New York
  • Plane Waves
  • Scattering
  • Three Dimensional
  • Waveguides
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Fluid Dynamics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.