Flexural gravity wave motion over poroelastic bed

被引:11
作者
Das, S. [1 ]
Behera, H. [1 ]
Sahoo, T. [1 ]
机构
[1] Indian Inst Technol Kharagpur, Dept Ocean Engn & Naval Architecture, Kharagpur, W Bengal, India
关键词
Poroelastic bed; Gravity waves; Two-layer fluid; Elastic plate; Dispersion relation; STEADILY MOVING SOURCE; OCEAN WAVES; HYDROELASTICITY; RESPONSES; VLFS;
D O I
10.1016/j.wavemoti.2016.02.002
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Using Biot's consolidation theory, effect of poroelastic bed on flexural gravity wave motion is analyzed in both the cases of single-layer and two-layer fluids. The model for the flexural gravity waves is developed using linear water wave theory and small amplitude structural response in finite water depth. The effects of permeability and shear modulus of poroelastic bed and time period on flexural gravity wave motion are studied by analyzing the dispersion relation, phase speed, plate deflection, interface elevation and pressure distribution along water depth. Various results for surface gravity waves are analyzed as special cases. The study reveals that bed permeability retards the hydrodynamic pressure distribution along the water depth significantly compared to shear modulus whilst, floating plate deflection decreases significantly with change in shear modulus compared to permeability of the poroelastic bed. The present study can be generalized to analyze various wave-structure interaction problems over poroelastic bed. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:135 / 148
页数:14
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