ISSN: 1945-7545
Page Count: 11

Wave Propagation in Soils: Multi-Mode, Wide-Band Testing in a Waveguide Device

Fratta, D
Graduate student and associate professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta,GA

Santamarina, JC
Graduate student and associate professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta,GA

Abstract

This paper presents the development of a waveguide device and the corresponding processing methodology to study wave propagation in particulate materials. Its main advantages are: the cancellation of biasing transfer functions (e.g., transducer, coupling, and electronics); the determination of both velocity and attenuation in a wide frequency range; the evaluation of torsional, flexural, and longitudinal propagation modes; and the computation of field propagation parameters from laboratory multi-mode data. Fundamentals of signal processing are reviewed, followed by a discussion of design considerations including boundary effects and geometric dispersion. Typical results are presented.

Keywords:
wave propagation, signal processing, material testing, phase velocity, attenuation, damping

Paper ID: GTJ10336J
DOI: 10.1520/GTJ10336J
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