Viscoelastic Finite Difference Modeling

Abstract

Real earth media disperse and attenuate propagating waves. This anelastic behavior can be well described by a viscoelastic model. We have developed a finite difference simulator to model wave propagation in viscoelastic media. The finite difference method was chosen in favor of other methods for several reasons. Finite difference codes are more portable than, for instance, pseudo-spectral codes. Moreover, finite difference schemes provide a convenient environment to define complicated boundaries. The finite difference method for viscoelastic wave propagation has been thoroughly investigated with convergence tests, dispersion and stability analyses. Two 2- D examples illustrate the difference between viscoelastic and elastic wave propagation.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1993
Accession Number
ADA446529

Entities

People

  • Joakim O. Blanch
  • Johan O. Robertsson
  • William W. Symes

Organizations

  • Rice University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Applied Mathematics
  • Boundaries
  • Elastic Waves
  • Geometry
  • Information Operations
  • Mathematics
  • Two Dimensional
  • Wave Propagation
  • Waves

Fields of Study

  • Mathematics

Readers

  • Computational Fluid Dynamics (CFD)
  • Seismology
  • Structural Dynamics.