Marine sediments are known to exhibit the nonlinearity parameter B/A that is much greater than that of homogeneous fluids and solids. The enormous value of B/A is particularly sensitive to the state of grain contacts. Although there exists a large body of literature that deals with the B/A of marine sediments, few studies have addressed how the random nature of grain contacts affects B/A. Here, we develop a model for the B/A of saturated, unconsolidated marine sediments, which accounts for random grain contacts. The number of contacts per grain and the distribution of contact stress between grains are treated statistically. The quadratic nonlinearity of the equivalent suspension of grains and the interstitial fluid is then combined with the nonlinearity arising from the random Hertzian contacts to produce the effective B/A of marine sediments.
|Title of host publication||Recent Developments in Nonlinear Acoustics|
|Subtitle of host publication||20th International Symposium on Nonlinear Acoustics including the 2nd International Sonic Boom Forum|
|Editors||Victor W. Sparrow, Didier Dragna, Philippe Blanc-Benon|
|Publisher||American Institute of Physics Inc.|
|Publication status||Published - 2015 Oct 28|
|Event||20th International Symposium on Nonlinear Acoustics, ISNA 2015, including the 2nd International Sonic Boom Forum, ISBF 2015 - Ecully, Lyon, France|
Duration: 2015 Jun 29 → 2015 Jul 3
|Name||AIP Conference Proceedings|
|Other||20th International Symposium on Nonlinear Acoustics, ISNA 2015, including the 2nd International Sonic Boom Forum, ISBF 2015|
|Period||15/6/29 → 15/7/3|
Bibliographical noteFunding Information:
This work was conducted in the Unmanned Technology Research Center (UTRC) sponsored by the Defense Acquisition Program Administration (DAPA) and the Agency for Defense Development (ADD) in the Republic of Korea.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)