Wave-induced seabed response in shallow water. (August 2019)

• Record Type: Journal Article
• Authors: Hsu, C.-J.; Chen, Y.-Y.; Tsai, C.-C.
• Is Part Of: Applied ocean research. Volume 89(2019)
• Page Start: 211
• Page End: 223
• Publication Date: 2019-08
• Subjects: 00-01 -- 99-00; Wave-seabed interaction -- Cnoidal theory -- Fourier series approximation -- Seabed response -- Liquefaction; Ocean engineering -- Periodicals; 620.416205
• DOI: 10.1016/j.apor.2019.05.016
• Languages: English
• ISSNs: 0141-1187

Abstract

Abstract: To simulate the wave-induced response of coupled pore fluids and a solid skeleton in shallow water, a set of solutions with different formulations (fully dynamic, partly dynamic, and quasi-static) corresponding to each soil behavior assumption is presented. To deal with Jacobian elliptic functions involved in the cnoidal theory, a Fourier series approximation is adopted for expanding the boundary conditions on the seabed surface. The parametric study indicates the significant effect of nonlinearity for shallow water wave, which also enhances the effect of soil characteristics. The investigation of the applicability of reduced formulations reveals the necessity of a partly or even fully dynamic formulation for the wave-induced seabed response problem in shallow water, especially for thickened seabed. The analysis of liquefaction in the seabed indicates that the maximum depth of liquefaction is shallower, and the width of liquefaction is broader under cnoidal wave loading. The present analytical model can provide more reasonable result for the wave-induced seabed response in the range of shallow water wave.