Shear Effects on Ocean Acoustic Propagation Due to Step-Periodic Roughness Along the Ocean Bottom Interface

Abstract

Low-frequency ocean acoustic propagation can be affected by backscatter from rough ocean bottoms and by compressional-shear wave conversions within the ocean bottom. Numerical simulations have been performed that include the effects of such backscattering and loss mechanisms. A full-wave range- dependent finite-element ocean seismo-acoustic computer model (SAFE) was used together with a simulated rough ocean bottom structure that supported compressional and shear wave speeds as well as compressional and shear wave attenuations. Step-periodic changes in depth and range along the water-bottom interface were used to simulate ocean-bottom roughness. A numerical example was used to illustrate the combined effects of ocean-bottom shear and roughness, and to give insight into these complicated processes.... Acoustic waves, Elastic waves, Seismic waves.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1993
Accession Number
ADA262977

Entities

People

  • Joseph E. Murphy
  • Stanley A. Chin-bing

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Attenuation
  • Backscattering
  • Computational Science
  • Differential Equations
  • Elastic Waves
  • Equations
  • Equations Of Motion
  • Frequency
  • Military Research
  • Radiation
  • Seabed
  • Secondary Waves
  • Waves

Readers

  • Acoustical Oceanography.