Numerical study on the wave dissipating performance of a submerged heaving plate breakwater

Fu, Ding; Zhao, Xizeng; Wang, Su; Yan, Dongming

doi:10.1016/j.oceaneng.2020.108310

Cited by 21 publications

(13 citation statements)

References 36 publications

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“…He et al (2018bHe et al ( , 2019 applied a CFD approach in terms of the smoothed particle hydrodynamics method (a Lagrangian-based mesh-free method) to investigate the effect of non-breaking and breaking waves on a fixed SHPB. He et al (2018a) and Fu et al (2021) performed numerical simulations of waves interacting with a heaving SHPB; both of the works have found that a heaving plate can be more effective than a fixed one in most of the submerged conditions. Rather than commonly studied horizontal plate, Yueh et al (2018) proposed a concept of submerged wavy plate breakwater, which appears to have better wave attenuating performance in certain situations with proper design, but the practicalities such as manufacturing cost and structural strength need to be further investigated.…”

Section: Used the Eigenfunction Expansion Methods Tomentioning

confidence: 99%

“…(2019), and Fu et al. (2021). It is deemed to have a negligible influence on the results of the present study as will also be validated in Section 3 against three‐dimensional experiments.…”

Section: Computational Approachmentioning

confidence: 95%

“…(2018a) and Fu et al. (2021) performed numerical simulations of waves interacting with a heaving SHPB; both of the works have found that a heaving plate can be more effective than a fixed one in most of the submerged conditions. Rather than commonly studied horizontal plate, Yueh et al.…”

Section: Introductionmentioning

confidence: 99%

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Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Huang

2021

Computer aided Civil Eng

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This work provides a novel approach that combines computational fluid dynamics (CFD) with computational solid mechanics (CSM) to dynamically simulate the fully coupled hydroelastic interaction between nonlinear ocean waves and a submerged horizontal plate breakwater (SHPB). Based on a systematic series of simulations, it is shown that the wave damping performance of an SHPB can be evidently improved by an appropriate extent of deformation, which can be achieved through the design of its bending stiffness by varying elasticity and/or aspect ratio. The wave attenuation effect is found to be maximized when an SHPB has a deformation amplitude close to the incident wave amplitude. By accounting for the hydroelastic effect through the fully coupled CFD+CSM approach, this work presents a new computational technique that supports the design of deformable offshore and coastal structures.

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Section: Used the Eigenfunction Expansion Methods Tomentioning

confidence: 99%

Section: Computational Approachmentioning

confidence: 95%

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Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Huang

2021

Computer aided Civil Eng

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“…Hammack (1973), Fuhrman and Madsen (2009), Zhao et al (2011) and Chen et al (2022), and (iv) as wave breakers in shallow waters to mitigate severity of large waves approaching the coastal area, see e.g. Hayatdavoodi et al (2017b), Liu et al (2017) and Fu et al (2021).…”

Section: Introductionmentioning

confidence: 99%

Experiments and computations of wave-induced oscillations of submerged horizontal plates

et al. 2023

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Wave-induced oscillations of submerged horizontal plates are studied by conducting laboratory experiments and by developing theoretical and computational models. These models include a linear solver based on the Green-function method, a nonlinear model based on Green–Naghdi wave equations, and a model based on computational fluid dynamics. The submerged horizontal plate oscillates in the vertical direction due to oscillatory wave loads. Oscillations of the plate are controlled by the use of a spring-damper system. Laboratory measurements and the models provide quantitative information on (i) how oscillations of submerged plates vary with wave conditions, plate characteristics, and the control system and (ii) how different models using different levels of assumptions predict the wave-induced oscillations. Particular attention is given to energy-production applications of the submerged oscillating plate, and discussion is provided on how the oscillation height and velocity vary with its initial submergence depth, stiffness of the attached spring, and the strength of the viscous damper. It is found that the oscillation varies almost linearly with the wave height, but nonlinearly with the wave period, initial submergence depth of the plate, damping, and the spring stiffness. Overall, it is found that nonlinearity plays an important role in this problem, while the effect of viscosity is negligible.

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“…breakwaters near the free surface were widely studied due to 26 their good performance and inexpensive cost in deep-water 27 and intermediate-water-depth areas [7], [10], one of which is 28 the plate-type breakwater. Since plate-type breakwaters are 29 easily constructed and environmentally friendly compared 30 to other types of breakwaters, many works on the hydrody-31 namic characteristics and wave dissipation performance of 32 plate-type breakwaters have been carried out [6], [11], [12], 33 [13], [14]. Reference [10] experimentally investigated the 34 influence of different relative plate lengths and spacing of 35 twin-plate breakwater when encountering incident waves 36 with different wave heights.…”

Section: Introductionmentioning

confidence: 99%

A Model Coupling CFD and DRL: Investigation on Wave Dissipation by Actively Controlled Flat Plate

et al. 2022

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In order to protect structures along the offshore and off the coast, breakwaters are commonly applied to reduce the influence of waves. Flat plate breakwater is studied frequently due to its great performance near the water surface, however, traditional passive methods such as fixed and floating flat plate breakwaters usually fail to give full play of effective wave dissipation when encountering variable unknown incoming waves. Therefore, this paper develops an interdisciplinary model coupling computational fluid dynamics (CFD) and deep reinforcement learning (DRL) to study the wave dissipation of a submerged movable flat plate breakwater against regular waves. An in-house numerical wave tank (NWT) is built to simulate the fluid-structure interaction between the plate and regular waves. The fluid domain in NWT is regarded as environment while the flat plate breakwater is agent. In addition, the wave dissipation strategy is learned by the artificial neural network (ANN) through the continuous wave-plate interaction. It is excited to find that the coupling model is able to learn the control strategies automatically and exhibits good adaptability to the changes of environment. 13 14 INDEX TERMS Wave dissipation, deep reinforcement learning, flat plate breakwater, active controlling, CFD and DRL. culated, of which the results showed that a suitable geo-49 metrical porosity of the upper plate leads to a low level of 50 uplift wave forces on both plates. Reference [17] investi-51 gated the flow field passing over a submerged horizontal 52 flat plate by means of a free surface potential flow model, 53 a form discretized by the Boundary Element Method (BEM), 54 from which the wave dissipation mechanism of a plate-55 type breakwater and the influence of plate thickness, length 56 and submergence was concluded. Reference [18] presented 57 an integrated CFD+CSM approach to fully simulate the 58 hydroelastic interaction between nonlinear ocean waves and 59 a deformable SHPB device, making two major contributions: 60 (a) the research work demonstrated a valid computer-aided 61 approach that can perform hydroelastic offshore and coastal 62 designs; (b) the researching work demonstrated a hydroelastic 63 design methodology for breakwaters for the first time and 64 showed that the deformation of the structure has a significant 65 effect on the wave-damping performance. References [19] 66 and [20] conducted an experiment to research the wave dissi-67 pation performance of a twin-plate considering various wave 68 conditions. References [21] and [22] investigated the interac-69 tion between freak waves based on numerically investigating 70 the interaction characteristics of horizontal deck structures 71 and freak waves, which revealed the corresponding phenom-72 ena, wave loads, and structural response. Reference [23] 73 further studied the interaction between Peregrine breather-74 based freak waves and twin-plate breakwaters, including the 75 characteristics of interaction phenomena, transmitted wave 76 surface, wave loads, and st...

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Numerical study on the wave dissipating performance of a submerged heaving plate breakwater

Cited by 21 publications

References 36 publications

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Design of the submerged horizontal plate breakwater using a fully coupled hydroelastic approach

Experiments and computations of wave-induced oscillations of submerged horizontal plates

A Model Coupling CFD and DRL: Investigation on Wave Dissipation by Actively Controlled Flat Plate

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