Accession Number:

AD0753613

Title:

Design of an Instrument to Measure the Shear Modulus of Soft Sediments.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s):

• Morgan,John Henry , II

Report Date:

1972-09-01

Pagination or Media Count:

44.0

Abstract:

The design considerations and the construction details of a torsionally oscillating vaned probe viscoelastometer to be used for measurement of the shear modulus of soft sediments are presented. Its operation involves measuring the reaction to the radiation of shear waves into the sediment from a vaned cylindrical probe which executes simple harmonic torsional oscillations. The radiation reaction should be sensitive to the viscoelastic parameters of the sediment. Torque and angular velocity sensors at the probe head provide a means of measuring the mechanical impedance. Sensor calibration procedures and their results are described. The instrument operates at frequencies in the neighborhood of 900 and 2700 Hz. Author

Descriptors:

• *OCEANOGRAPHIC EQUIPMENT
• *OCEAN BOTTOM
• VISCOELASTICITY
• SEDIMENTATION
• SHEAR STRESSES
• TORQUE
• CALIBRATION
• OPERATION
• THESES

Subject Categories:

• Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE