Finite Difference Modelling of Seismic Wave Propagation at the Seafloor

Abstract

The Objectives of this study were (1) to implement the WHOI finite difference code on the CONVEX computer at NORDA and (2) to run a suite of models on the effects of lateral heterogeneity on the primary response from the seafloor. Finite difference solutions to the elastic wave equation accurately predict the response of impulsive and continuous waves sources wave types are included (reflections, refractions, diffractions, Stoneley and pseudo-Rayleigh waves, evanescent waves and head waves). The primary disadvantage of the method is that it is very computation intensive and it is generally limited to problems with dimensions of only a few tens of wavelengths. This can be partially alleviated by using powerful computers such as the CONVEX at NORDA.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA248345

Entities

People

  • R. A. Stephen

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Basements
  • Boundaries
  • Computers
  • Continuous Waves
  • Diffraction
  • Elastic Waves
  • Equations
  • Evanescent Waves
  • Frequency
  • Geophysics
  • Rayleigh Waves
  • Seabed
  • Secondary Waves
  • Seismic Waves
  • Wave Propagation
  • Waves

Readers

  • Coastal Oceanography
  • Systems Analysis and Design
  • Wave Propagation and Nonlinear Chaotic Dynamics.