Dissipation of gravity waves due to submerged porous plate coupled with porous structures

IF 1.3 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme Pub Date : 2022-09-21 DOI:10.1115/1.4055702

Athul Krishna, Khansa Abdulla, D. Karmakar

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引用次数: 2

Abstract

The present study focuses on the wave trapping due to the submerged horizontal porous plate combined with bottom-standing porous structure and surface-piercing porous structure. The submerged plate thickness is considered to be negligible as compared to the incident wavelength and water depth and the porous structure is considered to be of finite width. The orthogonal mode-coupling relation is used to analyse the wave interaction with the combined structure. The reflection, transmission and dissipation coefficients along with wave force on the porous structure and surface deflection in the incident and transmitted region is investigated for the study of hydrodynamic performance of the composite porous breakwater system. Further, the effect of porosity of submerged plate and structure, friction factor, submerged depth of plate and structure angle of incidence and gap between the submerged plate and porous structure are investigated to analyse the effective wave dissipation by the porous breakwater system. In addition, the comparative study of the present method is performed with the results available in the literatures. The study noted that wave damping due to the submerged porous plate backed by surface-piercing porous structure is more as compared to the submerged porous plate backed by bottom-standing porous structure. The study will be helpful to scientist and engineers in the design of suitable composite breakwater system for wave attenuation in the coastal region.

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水下多孔板耦合多孔结构对重力波的耗散

本研究的重点是浸没水平多孔板与底部直立多孔结构和表面穿透多孔结构相结合所引起的波浪捕获。与入射波长和水深相比，浸没板的厚度被认为是可以忽略的，并且多孔结构被认为是有限宽度的。采用正交模式耦合关系分析了组合结构与波浪的相互作用。为了研究复合多孔防波堤系统的水动力性能，研究了波在多孔结构上的反射、透射和耗散系数以及入射和透射区域的表面偏转。此外，还研究了淹没板和结构的孔隙率、摩擦系数、板的淹没深度以及结构的入射角和淹没板与多孔结构之间的间隙对多孔防波堤系统有效消波的影响。此外，本方法还与文献中的结果进行了比较研究。该研究指出，与底部直立多孔结构支撑的浸没多孔板相比，由表面穿透多孔结构支撑在水中的多孔板引起的波浪阻尼更大。该研究将有助于科学家和工程师设计适合沿海地区波浪衰减的复合防波堤系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme 工程技术-工程：大洋

CiteScore

4.20

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Offshore Mechanics and Arctic Engineering is an international resource for original peer-reviewed research that advances the state of knowledge on all aspects of analysis, design, and technology development in ocean, offshore, arctic, and related fields. Its main goals are to provide a forum for timely and in-depth exchanges of scientific and technical information among researchers and engineers. It emphasizes fundamental research and development studies as well as review articles that offer either retrospective perspectives on well-established topics or exposures to innovative or novel developments. Case histories are not encouraged. The journal also documents significant developments in related fields and major accomplishments of renowned scientists by programming themed issues to record such events. Scope: Offshore Mechanics, Drilling Technology, Fixed and Floating Production Systems; Ocean Engineering, Hydrodynamics, and Ship Motions; Ocean Climate Statistics, Storms, Extremes, and Hurricanes; Structural Mechanics; Safety, Reliability, Risk Assessment, and Uncertainty Quantification; Riser Mechanics, Cable and Mooring Dynamics, Pipeline and Subsea Technology; Materials Engineering, Fatigue, Fracture, Welding Technology, Non-destructive Testing, Inspection Technologies, Corrosion Protection and Control; Fluid-structure Interaction, Computational Fluid Dynamics, Flow and Vortex-Induced Vibrations; Marine and Offshore Geotechnics, Soil Mechanics, Soil-pipeline Interaction; Ocean Renewable Energy; Ocean Space Utilization and Aquaculture Engineering; Petroleum Technology; Polar and Arctic Science and Technology, Ice Mechanics, Arctic Drilling and Exploration, Arctic Structures, Ice-structure and Ship Interaction, Permafrost Engineering, Arctic and Thermal Design.