Measuring and testing – Testing by impact or shock – Specimen impactor detail
Patent
1995-11-01
1997-10-28
Biegel, Ronald L.
Measuring and testing
Testing by impact or shock
Specimen impactor detail
73 84, 73 1204, G01N 300
Patent
active
056819820
ABSTRACT:
An apparatus and method is disclosed for determining geotechnical and geoacoustic properties of seafloor sediment wherein the undrained shear strength and dynamic shear modulus of such sediments can be quantified. Features of the deceleration profile of a seafloor penetrometer are compared to a data base of known insitu properties of seafloor sediments to determine a correlation between the features of the deceleration profile, such as maximum deceleration or jerk, and the seafloor sediment undrained shear strength. The damped oscillatory portion of the penetrometer deceleration profile, which occurs after plastic deformation and further permanent penetration into the sediments ends, is analyzed to determine the dominant or resonant frequency of the oscillations. This dominant frequency can be used to determine the seafloor sediment dynamic shear modulus.
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Akal Tuncay
Stoll Robert D.
Biegel Ronald L.
The Trustees of Columbia University in the City of New York
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