The use of surface wave techniques for verification of dynamic rigidity measurements in a kaolinite-water artificial sediment.
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Authors
Walsh, William Egan
Subjects
Advisors
Wilson, O.B.
Andrews, R.S.
Date of Issue
1971-06
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A three-dimensional model for the study of surface wave
speed measurements in simulated ocean bottom sediments has
been constructed using a high-porosity kaolinite-water
mixture in a rectangular tank in the laboratory. The propagation
of surface waves , assumed to be Rayleigh waves , was
studied over the 75 Hz to 300 Hz frequency range using a
gated sine wave source and several geophone receivers.
Shear wave speeds in the sediment are determined to be
23 m/sec. These measurements are qualitatively compared
with measurements made by previous investigators in similar
sediments using a torsionally oscillating rod viscoelastometer
whose resonant characteristics are sensitive to
loading by the sediment in which it is imbedded. Good
correlation of results is found with the shear wave speeds
calculated from the viscoelastometer data which are in the
range of 20 to 30 m/sec.
Type
Thesis
Description
Series/Report No
Department
Oceanography