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http://hdl.handle.net/10397/76073
| Title: | Nonlinear wave propagation in porous materials based on the Biot theory | Authors: | Tong, LH Liu, YS Geng, DX Lai, SK |
Issue Date: | Aug-2017 | Source: | Journal of the Acoustical Society of America, Aug. 2017, v. 142, no. 2, p. 756-770 | Abstract: | Nonlinearity must be considered with some porous granular media because of the large deformation under seismic waves. In this study, the propagation of nonlinear waves in porous media is studied based on the Biot theory and the governing equations are obtained by the Lagrangian formulation. Three new nonlinear parameters are introduced to consider the coupled nonlinearity between the solid and fluid components in porous media. It is shown that an additional nonlinear wave with a double frequency is generated by the coupling effect of linear fast and slow waves. When only a shear wave is applied at the source, no double-frequency nonlinear wave is predicted and three nonlinear longitudinal waves are generated. On the basis of the practical case studies, the effect of strong nonlinearity is computed under the influence of a one-dimensional single longitudinal wave source and a single shear wave source. | Publisher: | Acoustical Society of America | Journal: | Journal of the Acoustical Society of America | ISSN: | 0001-4966 | EISSN: | 1520-8524 | DOI: | 10.1121/1.4996439 | Rights: | Copyright 2017 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in L. H. Tong, Y. S. Liu, D. X. Geng, and S. K. Lai, J. Acoust. Soc. Am. 142, 756 (2017) and may be found a thttps://doi.org/10.1121/1.4996439. |
| Appears in Collections: | Journal/Magazine Article |
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|---|---|---|---|---|
| 1.4996439.pdf | 2.38 MB | Adobe PDF | View/Open |
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