Wave Diffraction on Arc-Shaped Floating Perforated Breakwaters

An analytical method is developed to study the sheltering effects on arc-shaped floating perforated breakwaters. In the process of analysis, the tloating breakwater is assumed to be rigid, thin, vertical, and immovable and located in water with constant depth. The fluid domain is divided into two re...

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Bibliographic Details
Published in:China ocean engineering 2012-06, Vol.26 (2), p.305-316
Main Authors: Duan, Jin-hui, Cheng, Jian-sheng, Wang, Jian-ping, Wang, Jing-quan
Format: Article
Language:English
Subjects:
Amplitudes
Breakwalls
Breakwaters
Coastal Sciences
Eigenfunctions
Engineering
Fluid flow
Fluid- and Aerodynamics
Fluids
Marine
Marine & Freshwater Sciences
Mathematical analysis
Mathematical models
Numerical and Computational Physics
Oceanography
Offshore Engineering
Simulation
入射光波长
圆弧形
本征函数展开
波浪绕射
流体界面
穿孔
线性代数方程组
防波堤
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Summary:An analytical method is developed to study the sheltering effects on arc-shaped floating perforated breakwaters. In the process of analysis, the tloating breakwater is assumed to be rigid, thin, vertical, and immovable and located in water with constant depth. The fluid domain is divided into two regions by imaginary interface. The velocity potential in each region is expanded by eigenfunction in the context of linear theory. By satisfying continuity of pressure and normal velocity across the imaginary fluid interface, a set of linear algebraic equations can be obtained to determine the unknown coefficients for eigenfunction expansions. The accuracy of the present model was verified by a comparison with existing results for the case of arc-shaped floating breakwater. Numerical results, in the form of contour maps of the non-dimensional wave amplitude around the breakwater and diffracted wave amplitude at typical sections, are presented for a range of wave and breakwater parameters. Results show that the sheltering effects on the arc-shaped floating perforated breakwater are closely related to the incident wavelength, the draft and the porosity of the breakwater.
ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-012-0023-3