| Effects of bottom shear stresses on the wave-induced dynamic response in a porous seabed：PORO-WSSI （shear） model |
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| 作者姓名： | J.Ye D.-S.Jeng |
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| 作者单位： | Division of Civil Engineering,University of Dundee;Center for Marine Geotechnical Engineering,State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University |
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| 基金项目： | supported by State Key Laboratory of Ocean Engineering Self-Development (GKZD010053-3) and EPSRC (EP/G006482/1) |
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| 摘 要： | When ocean waves propagate over the sea floor,dynamic wave pressures and bottom shear stresses exert on the surface of seabed.The bottom shear stresses provide a horizontal loading in the wave-seabed interaction system,while dynamic wave pressures provide a vertical loading in the system.However,the bottom shear stresses have been ignored in most previous studies in the past.In this study,the effects of the bottom shear stresses on the dynamic response in a seabed of finite thickness under wave loading will be examined,based on Biot’s dynamic poro-elastic theory.In the model,an "u-p" approximation will be adopted instead of quasi-static model that have been used in most previous studies.Numerical results indicate that the bottom shear stresses has certain influences on the wave-induced seabed dynamic response.Furthermore,wave and soil characteristics have considerable influences on the relative difference of seabed response between the previous model(without shear stresses) and the present model(with shear stresses).As shown in the parametric study,the relative differences between two models could up to 10% of p0,depending on the amplitude of bottom shear stresses.
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| 关 键 词： | 准静态模型 波浪作用 动态响应 底部 海底 剪力 波罗 剪切 |
Effects of bottom shear stresses on the wave-induced dynamic response in a porous seabed: PORO-WSSI (shear) model |
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| J.Ye,D.-S.Jeng.Effects of bottom shear stresses on the wave-induced dynamic response in a porous seabed: PORO-WSSI (shear) model[J].Acta Mechanica Sinica,2011,27(6):898-911. |
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| Authors: | J Ye D -S Jeng |
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| Institution: | J.Ye · D.-S.Jeng Center for Marine Geotechnical Engineering,State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,200240 Shanghai,China Division of Civil Engineering,University of Dundee,DD1 4HN,UK |
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| Abstract: | When ocean waves propagate over the sea floor, dynamic wave pressures and bottom shear stresses exert on the surface of seabed.
The bottom shear stresses provide a horizontal loading in the wave-seabed interaction system, while dynamic wave pressures
provide a vertical loading in the system. However, the bottom shear stresses have been ignored in most previous studies in
the past. In this study, the effects of the bottom shear stresses on the dynamic response in a seabed of finite thickness
under wave loading will be examined, based on Biot’s dynamic poro-elastic theory. In the model, an “u-p” approximation will be adopted instead of quasi-static model that have been used in most previous studies. Numerical results
indicate that the bottom shear stresses has certain influences on the wave-induced seabed dynamic response. Furthermore, wave
and soil characteristics have considerable influences on the relative difference of seabed response between the previous model
(without shear stresses) and the present model (with shear stresses). As shown in the parametric study, the relative differences
between two models could up to 10% of p
0, depending on the amplitude of bottom shear stresses. |
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| Keywords: | Bottom shear stresses · Wave-induced dynamic response · Porous seabed · "u-p" approximation · Biot’s theory |
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