Wave-induced seabed response in shallow water |
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| Institution: | 1. Tainan University of Technology, Tainan 71002 Taiwan;2. Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan;3. Department of Marine Environment and Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan;4. Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan |
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| 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. |
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| Keywords: | Wave-seabed interaction Cnoidal theory Fourier series approximation Seabed response Liquefaction |
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