Flexible Membrane Wave Barrier. II: Floating/Submerged Buoy-Membrane System

Kee, S.T.; Kim, M. H.

doi:10.1061/(asce)0733-950x(1997)123:2(82)

Cited by 39 publications

(4 citation statements)

References 14 publications

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“…These included single membranes (Kim and Kee, 1996;Kee and Kim, 1997), and dual membrane arrangements (Cho et al, 1998;Lo, 1998). It was found that the wave transmission could be controlled primarily by the membrane tension, and in the dual membrane arrangement, the membrane spacing.…”

Section: Introductionmentioning

confidence: 99%

Performance of a Flexible Membrane Wave Barrier of a Finite Vertical Extent

2000

Coastal Engineering Journal

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This study investigates the interaction of water waves with a vertical flexible membrane of a finite extent which is less than the water depth. The cases considered include that of a membrane descending from the water surface or ascending from the seabed, and that of an immersed membrane with gaps at both the top and the bottom. Linear wave theory and small membrane response are assumed and used. A numerical solution is developed based on eigenfunction expansions for the wave velocity potential and membrane motion. The computed results agree well with the reported results of a rigid barrier and of a flexible membrane spanning the entire depth. It is found that cancellation can occur from wave diffraction across the gap and that arising from the membrane motion resulting in a small transmitted wave. The membrane extent, location in the water column and tension are significant factors governing the wave interaction. The effect of these parameters, as well as wave frequency and wave incidence direction, on the transmitted wave is discussed.

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Section: Introductionmentioning

confidence: 99%

Performance of a Flexible Membrane Wave Barrier of a Finite Vertical Extent

2000

Coastal Engineering Journal

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“…Previous studies have highlighted the advantages of free surface breakwaters over bottom-founded ones, including their easy rearrangement, relocation, and minimal environmental impact (Cebada-Relea et al, 2023;Fouladi et al, 2023;Guo et al, 2022;. breakwaters (Paotonan et al, 2022;Yang et al, 2018;Diamantoulaki & Angelides, 2010;Kee, 2005;Koutandos et al, 2004). Additionally, research by Uzaki et al (2011) and Ji et al (2018) explored alternative combination forms, such as main boxes coupled with vertical or horizontal plates.…”

Section: Introductionmentioning

confidence: 99%

“…While numerical analyses of flexible membranes have been conducted (Cebada-Relea et al, 2023;Chen et al, 2023;Cui et al, 2022;Diamantoulaki & Angelide, 2010;Ji et al, 2023;Kee, 2005;Li et al, 2020;Park & Kim, 2023;Wei & Yin, 2022;Yin et al, 2023), experimental studies, especially for combined breakwater types, remain limited. Quantitative information on the hydraulic behavior of such breakwaters is also scarce, emphasizing the need for further research.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Assessment of A Fixed Box-Type Breakwater as Temporary Coastal Protection Against Wave Actions

Sazali,

Haron

2024

JSCET

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Coastal areas are vulnerable to the erosive forces of waves, particularly during storm events. Temporary coastal protection measures are often necessary to mitigate damage while permanent solutions are being developed. This study investigates the effectiveness of a fixed box-type breakwater as a temporary measure against wave action. Laboratory experiments were conducted to assess the performance of the breakwater under varying wave conditions. The wave attenuation performance of the proposed breakwater was tested in a series of early experiments in a two-dimensional (2D) wave flume under various conditions, including frequency and wave periods for different models (FB1 without membrane, FB2 with a single 46cm membrane, FB3 with 46cm and 56cm double membranes, and FB4 with a single 56cm membrane). Additionally, the flexible membrane's length was examined, along with other derived breakwater designs such as rectangle boxes and boxes joined by a single flexible membrane. Results indicate significant wave attenuation behind the breakwater, suggesting its potential efficacy in protecting coastal areas. According to the findings, the fixed breakwater (FB3 model) might successfully reduce waves by about 50% in moderately longer waves with a wave period of 2s. This article presents the methodology, experimental setup, results, and implications of the study, highlighting the suitability of fixed box-type breakwaters as a viable temporary coastal protection solution.

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“…In coastal engineering, partial bottom mounted barrier is often preferred as it not only reduces the wave amplitude at the resonance, but also allows the navigation of vessels and controls the coastal erosion by restricting the sediment transport (YIP et al, 2002). The performance of vertical tensioned single and dual membranes spanning the entire water depth were studied by KIM & KEE (1996), KEE & KIM (1997), LO (2000) and LEE & LO (2002) and the literature cited therein. In addition to the flexible nature of the breakwater, porous structures are often suggested for breakwater systems as they are more efficient in dissipating the incident wave energy and thus reducing the wave load on the barrier (CHWANG & CHAN, 1998).…”

Section: Introductionmentioning

confidence: 99%

Vertical porous membrane barrier for coastal structure near a wall

Bhattacharjee¹,

Soares²

2011

Edition 2, Tanger, Maroc

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Abstract:The performance of a vertical porous membrane barrier as a breakwater to reduce the wave load on a floating structure near a wall is investigated using linearized water wave theory. The physical problem is modeled in the two dimensional Cartesian coordinate system. A rigid rectangular box is floating in water of finite depth near a rigid vertical wall. The porous membrane breakwater touches the bottom and the tip of the membrane is submerged. Both ends of the membrane are assumed to be kept fixed. The method of eigenfunction expansion and the corresponding orthogonal mode-coupling relations are used to obtain an analytic solution to the boundary value problem. The effect of porosity and tension of the membrane on the wave transmission, wave length and wave amplitude is analyzed.

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Flexible Membrane Wave Barrier. II: Floating/Submerged Buoy-Membrane System

Cited by 39 publications

References 14 publications

Performance of a Flexible Membrane Wave Barrier of a Finite Vertical Extent

Performance of a Flexible Membrane Wave Barrier of a Finite Vertical Extent

Laboratory Assessment of A Fixed Box-Type Breakwater as Temporary Coastal Protection Against Wave Actions

Vertical porous membrane barrier for coastal structure near a wall

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