Frequency Dependent Attenuation in Rocks

A comparison of laboratory Q values calculated from phase angles and hysteresis loop areas reveals an inconsistency. Q values calculated from hysteresis loops are a factor of 4 times greater than those from the phase angle. The source of this inconsistency is the definition of maximum strain energy...

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Main Authors: Coyner, Karl B, Martin, Randolph J
Format: Report
Language:English
Subjects:
ANGLES
ANISOTROPY
ATTENUATION
FREQUENCY
FREQUENCY DEPENDENCE
Geology, Geochemistry and Mineralogy
GRANITE
HYSTERESIS
LABORATORY TESTS
LOOPS
PE62714E
PHASE
ROCK
SEISMIC WAVES
Seismology
STRESS STRAIN RELATIONS
WUAFGL7A10DADA
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Martin, Randolph J
description A comparison of laboratory Q values calculated from phase angles and hysteresis loop areas reveals an inconsistency. Q values calculated from hysteresis loops are a factor of 4 times greater than those from the phase angle. The source of this inconsistency is the definition of maximum strain energy for a hysteresis loop. An accounting of this factor of 4 is significant in comparing various experimental results that have used either of the two techniques. Keywords: Seismic waves, Attenuation; Anisotropy; Rock properties; Stress strain relations; Granite; Laboratory tests.
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Q values calculated from hysteresis loops are a factor of 4 times greater than those from the phase angle. The source of this inconsistency is the definition of maximum strain energy for a hysteresis loop. An accounting of this factor of 4 is significant in comparing various experimental results that have used either of the two techniques. 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source DTIC Technical Reports
subjects ANGLES
ANISOTROPY
ATTENUATION
FREQUENCY
FREQUENCY DEPENDENCE
Geology, Geochemistry and Mineralogy
GRANITE
HYSTERESIS
LABORATORY TESTS
LOOPS
PE62714E
PHASE
ROCK
SEISMIC WAVES
Seismology
STRESS STRAIN RELATIONS
WUAFGL7A10DADA
title Frequency Dependent Attenuation in Rocks
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