The Implicit Finite-Difference (IFD) Acoustic Model in a Shallow Water Environment.

Abstract

In this thesis an implicit finite-difference (IFD) computer model was developed by Jaeger to solve the parabolic equation. The model preserves continuity of pressure and the normal component of particle velocity at the ocean bottom where there is an interface between media with different sound speeds and densities. This feature was implemented to make the model more accurate in a shallow water environment. The IFD performance in a shallow water environment is analyzed. The IFD results are compared with those of two other models and analyzed in light of basic physical reasoning. In addition, a single sloping ocean bottom is modeled in an experimental tank so that the measured pressure field can also be compared to IFD model results. Originator-supplied keywords include: Pressure Amplitude, Trapped Normal Mode Propagation, Shallow Water Acoustics, and Ocean Modeling.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1984
Accession Number
ADA150784

Entities

People

  • M. E. Kosnik

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Autonomy
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Attenuation
  • Computers
  • Drops
  • Engineering
  • Frequency
  • Graphics
  • Losses
  • Measurement
  • Particles
  • Plastic Explosives
  • Reasoning
  • Seabed
  • Shallow Water
  • Transmission Loss
  • United States
  • Water

Readers

  • Acoustical Oceanography.
  • Computational Fluid Dynamics (CFD)
  • Marksmanship and Weaponry.