Critical Frequencies in Scattering from Submerged Elastic Shells

Abstract

In the process of scattering from submerged elastic shells, it is possible to excite many types of resonances. Among these are the lowest order symmetric and antisymmetric Lamb modes, and the waterborne waves, such as the pseudo-Stoneley resonances and the higher order symmetric and antisymmetric Lamb modes Si and Ai (i = 1, 2, 3, ...). the frequency at which these originate are referred to as critical frequencies. We establish simple rules to determine the frequencies at which the resonances originate as a function of shell thickness and material properties.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1992
Accession Number
ADA258769

Entities

People

  • Hassan B. Ali
  • Michael F. Werby
  • Michael K. Broadhead

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Acoustic Waves
  • Acoustics
  • Backscattering
  • Classification
  • Elastic Shells
  • Elastic Waves
  • Frequency
  • Military Research
  • New York
  • Phase Velocity
  • Resonance Scattering
  • Scattering
  • Standing Waves
  • Target Recognition
  • Wave Propagation
  • Waves

Readers

  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Structural Dynamics.