Measurements of acoustic wave velocities and attenuation in marine sediments
作者:
Altan Turgut,
Tokuo Yamamoto,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1990)
卷期:
Volume 87,
issue 6
页码: 2376-2383
ISSN:0001-4966
年代: 1990
DOI:10.1121/1.399084
出版商: Acoustical Society of America
关键词: SEDIMENTS;SOUND VELOCITY;SAND;SOUND WAVES;ATTENUATION;FREQUENCY DEPENDENCE;POROSITY;COMPRESSIONAL WAVES;PERMEABILITY
数据来源: AIP
摘要:
Propagation and attenuation of acoustic waves in fluid‐saturated sediments have been studied theoretically and experimentally.Insituacoustic transmission tests in saturated beach sand show that compressional waves are dispersive within a certain frequency band where the intrinsic attenuation is maximum. This indicates that low‐frequency wave velocities in marine sediments are at least 5% to 10% less than the velocities obtained from high‐frequency measurements, and viscous damping, due to the relative motion between solid skeleton and fluid, is the main damping mechanism in the frequency range of 1–30 kHz. The agreement between the experimental results and Biot’s theory enables the remote determination of porosity and permeability of marine sediments by using measured compressional and shear wave characteristics. Approximate relations are used to determine the porosity and permeability of the marine sediments using the measured acoustic wave velocities and attenuation.
点击下载:
PDF
(1021KB)
返 回