Representative Transmission Coefficient for Evaluating the Wave Attenuation Performance of 3D Floating Breakwaters in Regular and Irregular Waves

Nguyen, Huu Phu; Park, Jeong Cheol; Han, Mengmeng; Wang, Chen; Abdussamie, Nagi; Penesis, Irene; Howe, Damon

doi:10.3390/jmse9040388

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…The ability of the SBW in transmitting the wave energy is measured by wave transmission coefficient (CT), which is the ratio of transmitted wave height (HT) to incident wave height (Hi) [17][18][19][20]. The lower the CT value, the higher the wave attenuation performance of the breakwater [17].…”

Section: Wave Transmissionmentioning

confidence: 99%

Performance Characteristics of a Submerged Semicircular Breakwater Exposed to Regular Waves: An Experimental Study

Ali Hamood Al-Towayti,

Hee Min

2024

E3S Web of Conf.

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Many mangrove replanting programs fail due to the drifting of the mangrove sapling by waves and coastal currents soon after the replanting. Hence, adequate wave protection for the mangrove planting site is required to enhance the survivability rates of the newly planted saplings. A small scaled modular submerged semicircular breakwater (SBW) is perceived to be a viable option to provide the required level of wave protection to mangroves. The study is set to investigate wave transmission, reflection, and energy loss by a SBW subjected to different immersion depths under a regular wave environment via physical modelling. The SBW model was tested in a wave flume and was subjected to relative immersion depth, i.e., a ratio of water depth to the height of the SBW, of 1.00 and 1.33, and wave steepness ranging from 0.02 to 0.06. The alternatively submerged SBW was found to be an effective breakwater design to provide the required level of wave tranquility to various coastal applications.

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Section: Wave Transmissionmentioning

confidence: 99%

Performance Characteristics of a Submerged Semicircular Breakwater Exposed to Regular Waves: An Experimental Study

Ali Hamood Al-Towayti,

Hee Min

2024

E3S Web of Conf.

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“…It is unknown to what degree these results were influenced by the varying draft of the plate when it had a different angle and thus a different distance to the bottom of the tank, which was relatively shallow. Studies into breakwater performance are recommended to be performed in irregular rather than regular waves [16]. Different studies found deviations in the transmission coefficient as well as in the loss and reflection coefficients for the two different tested conditions [22].…”

Section: Introductionmentioning

confidence: 99%

Force and water jet impact reduction on adjacent structures by means of free surface breakwaters

Holkema,

Aalbers,

Wellens

2023

ISP

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In head waves, water jet impacts due to run up can occur as a result of the structural configuration of some floating structures, reducing workability. Wave attenuation near the floater may reduce the risk of water jet impacts. This paper presents a numerical study of the performance and attenuation mechanisms of various plate type fixed free surface breakwaters and their ability to prevent water jet impacts on adjacent structures. Simulations are performed in two dimensions with a numerical method based on the Navier–Stokes equations in the presence of a free surface. The breakwater models are evaluated in two irregular sea states in terms of wave transmission, reflection and energy dissipation and by their ability to reduce water jets impacts on adjacent structures. A 60 degree inclined plate is found to induce a large wave energy reduction, little wave transmission and reflection and to experience little wave loading while effectively reducing water jet impacts.

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“…Breakwaters can either be bottom founded or self-floating and may be used to protect shoreline or marine structures. Floating breakwaters have a few advantages when compared to the bottom founded ones, such as the lower construction cost and less environmental impact [4]. One unique advantage of floating breakwaters is that the influence from tidal variation and sea level rise can be minimized.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Floating Breakwater in Special Configurations for Protecting Nearshore Infrastructures

Zhang

Magee

2021

JMSE

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This paper investigates the effectiveness of floating breakwaters consisting of two barges (L-shape), three barges (U-shape), four barges (barge frame), and conventional single floating breakwater. The floating breakwaters of different spatial layouts have sheltered internal gaps/moonpools when compared to their conventional counterparts. The motions of these floating breakwaters and their effectiveness in wave transmission and motion reduction of the protected floating bodies are evaluated. The study is conducted based on a subsystem of a floating hydrocarbon storage facility that combines a floating breakwater with two floating tanks, studied previously. Numerical models based on linear potential flow theory are built for these floating breakwaters with and without the floating tanks. The numerical models of the barge frame are validated through laboratory experiments, and the dipole damping lids to reduce the resonant fluid motions in the gaps/moonpools are calibrated with experimental results. The L-shape floating breakwater is found effective in reducing wave transmissions without the presence of the floating tanks, while the barge frame is the most effective in the motion reduction of the floating tanks. In addition, significant fluid resonant motions are identified for all investigated floating breakwaters, including the conventional one. Orienting the structure obliquely can improve the performance of the floating breakwaters of special configurations, especially the barge frame. The results and findings show the importance of considering the protected floating structures in the analysis when designing floating breakwaters for many types of marine structures, including floating fish farms and floating cities in coastal waters.

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Representative Transmission Coefficient for Evaluating the Wave Attenuation Performance of 3D Floating Breakwaters in Regular and Irregular Waves

Cited by 12 publications

References 28 publications

Performance Characteristics of a Submerged Semicircular Breakwater Exposed to Regular Waves: An Experimental Study

Performance Characteristics of a Submerged Semicircular Breakwater Exposed to Regular Waves: An Experimental Study

Force and water jet impact reduction on adjacent structures by means of free surface breakwaters

Effectiveness of Floating Breakwater in Special Configurations for Protecting Nearshore Infrastructures

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