An Assessment of the Biot-Stoll Model of a Poroelastic Seabed

Abstract

This report evaluates the effectiveness of the Biot-Stoll model of a poroelastic seabed in predicting experimentally observed phenomena in underwater acoustics. Discussed in the report is the derivation of the model from physical principles, including more recent extensions such as the distributed pore size formulation of Turgut and Yamamoto and a more sophisticated approach to modeling intergranular effects advocated by Chotiros and Isakson. It is found that with the incorporation of these two extensions, the Biot-Stoll model is capable of producing good agreement with experimentally measured values of compressional wave speed and attenuation. It should be noted however, that there are not currently efficacious ways of measuring the new parameters introduced by these extensions other than adjusting them to wave speed and attenuation data measured over multiple decades of frequency. Also discussed in the report are the determination of the Biot-Stoll parameters, reflection and transmission at the ocean sediment surface, models for depth-varying sediment properties and some of the difficulties with, and controversies concerning, the Biot-Stoll model.

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Document Details

Document Type
Technical Report
Publication Date
Aug 05, 2005
Accession Number
ADA437036

Entities

People

  • James L. Buchanan

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Bulk Modulus
  • Composite Materials
  • Computational Science
  • Constitutive Equations
  • Equations
  • Equations Of Motion
  • Frequency
  • Grain Size
  • Materials
  • Measurement
  • Military Research
  • Molecular Dynamics
  • Poisson Ratio
  • Relative Motion
  • Shear Modulus
  • United States Naval Academy

Readers

  • Acoustical Oceanography.
  • Computational Modeling and Simulation
  • Theoretical Analysis.