Hydraulic Characteristics of a Stepped-slope Floating Breakwater

Teh, Hee Min; Ismail, Hadibah

doi:10.1088/1755-1315/16/1/012060

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…For all types of floating breakwaters, increasing incident wave amplitude enhance the wave attenuation effectiveness when structure is exposed to shorter period waves (T<1.5 s). This implies that the shorter and higher waves tend to have more intense interactions with the floating structurethe same trend has also been found by Teh and Ismail [26]. However, in long wave regime (T>1.5 s), the transmission coefficient increases with increasing incident wave amplitude for Model 1, 2 and 3, and the turning phenomenon of Model 2 is not outstanding when Ai=0.075 m owing to the permeability of this porous floating breakwater.…”

Section: Transmission Coefficientsupporting

confidence: 80%

Hydrodynamic performance of floating breakwaters in long wave regime: An experimental study

Cheng

Cui

et al. 2018

Ocean Engineering

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Hydrodynamic behavior tests of long water waves with the floating breakwater is a important mission in some near-reef sea areas. Especially, the performance of the wave would be more complex when natural periods of the motion are defined within the range of wave frequencies. In this study, a series of experiments are conducted under long regular wave actions to investigate the hydrodynamic performance of four slack-moored floating breakwater models, which include single box, single porous box, double cylindrical pontoon and double cylindrical pontoon with mesh cage and suspending balls. The experimental results display that the wave transmission and wave energy dissipation for four models have multiple turning points produced near the natural periods of floating structures in long wave regime, while that is not evident for the reflection coefficient. The resonant responses are also observed in the motions and mooring tension of four models, which further explain the turning point phenomenon appeared in transmission and dissipation coefficient. The overall results reveal that the porous plates and mesh cage with balls is effective for mitigating the turning point phenomenon due to additional water mass and damping effects, and also holds the potential for reducing the motions and mooring forces, which validate the feasibility of the novel floating breakwaters.

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Section: Transmission Coefficientsupporting

confidence: 80%

Hydrodynamic performance of floating breakwaters in long wave regime: An experimental study

Cheng

Cui

et al. 2018

Ocean Engineering

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“…This is because high viscosity implicitly imposes a no-slip boundary condition on the interface of liquid and solid. The FB was assumed to be homogeneous and solid with r FB = 0.75r w (Teh and Ismail 2013). The average angular and translational velocities were evaluated by applying the conservation law of the angular and linear momentum as:…”

Section: Fast Fictitious Domain Methodsmentioning

confidence: 99%

A machine learning method for the evaluation of hydrodynamic performance of floating breakwaters in waves

Saghi

Mikkola

Hirdaris

2021

Ships and Offshore Structures

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This paper presents a two-dimensional simulation model for the idealisation of moored rectangular and trapezoidal floating breakwaters (FB) motions in regular and irregular waves. Fast-Fictitious Domain and Volume of Fluid methods are coupled to track-free surface effects and predict FB motions. Hydrodynamic performance is assessed by a machine learning method based on Cuckoo Search-Least Square Support Vector Machine model (CS-LSSVM). Results confirm that a suitable combination of the aspect ratio of an FB and her sidewall mooring angle could help attenuate incoming waves to a minimum height. It is concluded that moored trapezoidal FBs are more efficient than traditional rectangular designs and subject to further validation CS-LSSVM can be useful in terms of optimising the values of predicted wave transmission coefficients.

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Hydrodynamic Difference of Rectangular-Box Systems with and without Narrow Gaps

Ning

Zhao

et al. 2015

J. Eng. Mech.

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Hydraulic Characteristics of a Stepped-slope Floating Breakwater

Cited by 4 publications

References 2 publications

Hydrodynamic performance of floating breakwaters in long wave regime: An experimental study

Hydrodynamic performance of floating breakwaters in long wave regime: An experimental study

A machine learning method for the evaluation of hydrodynamic performance of floating breakwaters in waves

Hydrodynamic Difference of Rectangular-Box Systems with and without Narrow Gaps

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