Wave-induced Porous Seabed Responses in Shallow Water
博士 === 國立中山大學 === 海洋環境及工程學系研究所 === 107 === This thesis presents 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 p...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2019
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| Online Access: | http://ndltd.ncl.edu.tw/handle/6fh25c |
| Summary: | 博士 === 國立中山大學 === 海洋環境及工程學系研究所 === 107 === This thesis presents 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 thick seabeds. The analysis of liquefaction in the seabed indicates that liquefaction extends to a shallow depth and the width of liquefaction is broader under cnoidal wave loading. The analysis of shear failure in the seabed indicates the result of cnoidal wave including the difference between the wave peak and the wave trough is better than that of linear wave. And the result taking into account the high order cnoidal wave adjust the result in seabed instability analysis and provide the consistent result. The present analytical model can provide reasonable results with respect to the wave-induced seabed response for shallow water waves.
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