Effect of sloping bottom on wave interaction with multiple flexible moored breakwaters

IF 1.3 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Saista Tabssum, Balaji Ramakrishnan
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引用次数: 0

Abstract

Abstract An analytical framework is developed to analyze the interaction of oblique waves with multiple flexible porous breakwaters under the consideration of bottom undulation. The mathematical problem is tackled using the small amplitude water-wave theory, with Darcy's law being applied to account for wave interaction with porous media. The bottom topography is considered to have a finite length, flanked by two semi-infinite sections of uniform bottom. The solution to the boundary value problem is approached by employing the eigenfunction expansion method within the uniform bottom regions. For the varying bottom topography, a modified mild-slope equation (MMSE) is utilized. To address the solution at the slope discontinuity at the bottom, a mass-conserving jump condition is applied. By matching solutions at the interfaces, a set of equations is derived. This system of equations encapsulates the behavior of reflection and transmission coefficients, as well as the force exerted on the breakwaters. These parameters are then investigated across various factors, such as the length of the varying bottom, depth ratio, angle of the mooring line, angle of incidence, and flexural rigidity. Graphical representations of the reflection and transmission coefficients, along with the breakwater force, provide insights into the system's behavior under different conditions. The water wave energy can be dissipated for the the optimum values of flexural rigidity. The transmission coefficient is observed to be least for higher mooring angle.
坡底对多柔性系泊防波堤波浪相互作用的影响
摘要建立了考虑底波波动的斜波与多柔性多孔防波堤相互作用分析框架。这个数学问题是用小振幅水波理论来解决的,达西定律被应用于解释波与多孔介质的相互作用。底部地形被认为有一个有限的长度,两侧是两个半无限的均匀底部部分。采用均匀底区域内的特征函数展开法,对边值问题进行了求解。对于变化的底部地形,采用了修正的缓坡方程(MMSE)。为了解决底部坡面不连续处的问题,采用了保质量跳跃条件。通过在界面处的解匹配,导出了一组方程。这个方程组包含了反射和透射系数的行为,以及施加在防波堤上的力。然后对这些参数进行各种因素的研究,如变化底部的长度、深度比、系泊线的角度、入射角和抗弯刚度。反射系数和透射系数的图形表示,以及防波堤力,提供了不同条件下系统行为的见解。水波能量可以在最优抗弯刚度值处耗散。当系泊角度较大时,传输系数最小。
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来源期刊
CiteScore
4.20
自引率
6.20%
发文量
63
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.
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