Assessment of global wave forces and moments on porous vertical barriers in random wave fields

IF 0.7 Q4 ENGINEERING, OCEAN

Ocean Systems Engineering-An International Journal Pub Date : 2021-09-01 DOI:10.12989/OSE.2021.11.3.237

S. Neelamani, N. Al-Anjari

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引用次数: 0

Abstract

Experimental investigations were carried out to assess the global wave forces and wave induced moments on slotted vertical barriers (SVB). Fourty two different wave barrier configurations (5%, 10%, 20%, 30%, 40%, 50% and 60% porosities and 1 to 6 number of slotted walls) were tested in random wave fields of JONSWAP spectra for wide range of significant wave heights and peak periods. It is found that the wave force is very sensitive to the change in porosity of the SVB. It is also found that relatively long waves and low porosity on SVB results in the highest wave force and short waves and high porosity on the SVB results in the lowest wave force. For most of the conditions, the wave force on SVB is less than the wave force on a single impervious vertical wall and force reduction to an extent of 20% to 80% is possible for the range of porosity and number of porous walls studied. A predictive equation to estimate the wave induced significant moment is provided with high regression coefficient. The average lever arm for assessing the wave induced moment is 0.6145 times the local water depth.

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随机波场中多孔垂直屏障的整体波浪力和力矩的评估

通过试验研究了槽式垂直障碍物的整体波浪力和波致力矩。在JONSWAP谱随机波场中测试了42种不同的波障结构(5%、10%、20%、30%、40%、50%和60%孔隙率以及1 ~ 6个开槽壁)，得到了较宽的显著波高和峰值范围。结果表明，波浪力对孔隙率的变化非常敏感。研究还发现，相对较长的波浪和较低的孔隙率导致波浪力最大，较短的波浪和较高孔隙率导致波浪力最小。在大多数情况下，作用在SVB上的波浪力小于作用在单个不透水垂直壁上的波浪力，并且在所研究的孔隙率和多孔壁面数量范围内，波浪力可能降低20%至80%。给出了一种具有高回归系数的估计波致有效矩的预测方程。评估波浪诱导矩的平均杠杆臂为当地水深的0.6145倍。

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来源期刊

Ocean Systems Engineering-An International Journal ENGINEERING, OCEAN-

自引率

22.20%

发文量

期刊介绍： The OCEAN SYSTEMS ENGINEERING focuses on the new research and development efforts to advance the understanding of sciences and technologies in ocean systems engineering. The main subject of the journal is the multi-disciplinary engineering of ocean systems. Areas covered by the journal include; * Undersea technologies: AUVs, submersible robot, manned/unmanned submersibles, remotely operated underwater vehicle, sensors, instrumentation, measurement, and ocean observing systems; * Ocean systems technologies: ocean structures and structural systems, design and production, ocean process and plant, fatigue, fracture, reliability and risk analysis, dynamics of ocean structure system, probabilistic dynamics analysis, fluid-structure interaction, ship motion and mooring system, and port engineering; * Ocean hydrodynamics and ocean renewable energy, wave mechanics, buoyancy and stability, sloshing, slamming, and seakeeping; * Multi-physics based engineering analysis, design and testing: underwater explosions and their effects on ocean vehicle systems, equipments, and surface ships, survivability and vulnerability, shock, impact and vibration; * Modeling and simulations; * Underwater acoustics technologies.