详情

原文传递 Diffraction of Solitary Waves by a Concentric Porous Dual-Arc Thin Wall

题名：	Diffraction of Solitary Waves by a Concentric Porous Dual-Arc Thin Wall
正文语种：	eng
作者：	Zhenfeng Zhai;Qing Hu;Lele Yang;Hua Huang
作者单位：	Dept. of Marine Engineering and Technology Sun Yat-Sen Univ. Zhuhai 519000 China;Dept. of Marine Engineering and Technology Sun Yat-Sen Univ. Zhuhai 519000 China;Dept. of Civil Engineering and Transportation South China Univ. of Technology Guangzhou 510641 China;Dept. of Aeronautics and Astronautics Sun Yat-Sen Univ. Shenzhen 518109 China
关键词：	Solitary wave; Dual-arc wall; Analytical derivation; Hydrodynamic force; Wave elevation
摘要：	Herein, a semianalytical model is presented for solitary wave diffraction by a surface-piercing concentric dual-arc thin wall. The two arc-shaped walls are porous and thin, and they are placed on a flat seafloor. As a key element, two imaginary closed cylindrical structures with two arc-shaped walls of different radii are introduced such that the entire computation domain can be partitioned into three subdomains, two bounded and one unbounded, based on common interfaces, within which the analytical solution is obtained using eigenfunction expression matching. Furthermore, a system of linear algebraic equations to determine the unknown coefficients is derived by satisfying the boundary and matching conditions. The numerical results obtained for the limiting cases are exactly the same as published results for a solid and porous cylindrical structure. Meanwhile, the effects of the wave incident angle, opening angle, annular spacing, and porous-effect parameter on wave loads and wave elevations are investigated. In addition, as a particular case, a concentric structure with an arc-shaped porous exterior wall is investigated as an alternative to the two-cylinder structure in practical engineering. It is discovered that the arc-shaped exterior wall can effectively reduce the wave force and wave height around the interior cylinder, compared with a single cylinder. By contrast, the wave forces and wave runup on the interior cylinder are similar to those of the interior cylinder of a concentric two-cylinder system.
出版年：	2022
期刊名称：	Journal of Waterway, Port, Coastal and Ocean Engineering
卷：	148
期：	2
页码：	04022001.1-04022001.19