Experimental study on the performance characteristics of porous perpendicular pipe breakwaters

Shih, Ruey-Syan

doi:10.1016/j.oceaneng.2012.05.010

Cited by 18 publications

(5 citation statements)

References 16 publications

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“…Penelitian tentang pemecah gelombang berpori telah banyak dilakukan dengan hasil bahwa koefisien refleksi meningkat dimana pipa yang lebih panjang lebih efisien dalam mengurangi koefisien refleksi (Shih, 2012). Pemecah gelombang terendam di depan garis pantai berpori menurunkan kecepatan gelombang pada tembok laut dan refleksi gelombang dengan variasi lebar seawall, porositas seawall, kedalaman air relatif dan kecuraman gelombang (Koraim, 2013).…”

Section: Pendahuluanunclassified

Pengaruh Parameter Gelombang Terhadap Transmisi Gelombang Pada Pemecah Gelombang Berongga Tipe Tenggelam

Asep Huddiankuwera,

Pangeran Holong Sitorus,

Rezky Aprilyanto Wibowo

2024

KoNTekS

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Pemecah gelombang atau breakwater adalah bangunan struktur pantai yang digunakan untuk mengantisipasi dan mengendalikan abrasi. Struktur peredam gelombang telah mengalami perkembangan yang signifikan, salah satu struktur peredam gelombang adalah pemecah gelombang berongga. Pemecah gelombang berongga memiliki model bervariasi yang selain meminimalisir refleksi gelombang karena kemampuannya dalam menyerap energi gelombang dan mereduksi terhadap energi gelombang datang, sehingga gelombang yang ditransmisikan menjadi lebih kecil. Penelitian ini bertujuan untuk mendapatkan hubungan parameter gelombang terhadap transmisi gelombang pada model pemecah gelombang berongga tipe tenggelam. Pada penelitian ini, kedalaman air (d) terdapat 3 variasi yaitu 30, 35 dan 40 cm, sedang tinggi struktur breakwater (h) adalah 30 cm. Hasil yang didapatkan bahwa nilai koefisien transmisi meningkat dengan meningkatnya kedalaman air dan periode gelombang. Nilai koefisien transmisi menurun dengan meningkatnya tinggi gelombang datang dan kecuraman gelombang. Ditemukan bahwa koefisien transmisi dipengaruhi oleh rasio tinggi struktur dan kedalaman air dimana nilai koefisien transmisi menurun dengan naiknya rasio tinggi struktur dan kedalaman air.

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Section: Pendahuluanunclassified

Pengaruh Parameter Gelombang Terhadap Transmisi Gelombang Pada Pemecah Gelombang Berongga Tipe Tenggelam

Asep Huddiankuwera,

Pangeran Holong Sitorus,

Rezky Aprilyanto Wibowo

2024

KoNTekS

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“…Based on the concept of maximum wave energy dissipation, floating breakwater research will continue to develop to produce effective and efficient performance. Some researchers have conducted studies of floating breakwaters in the porous form in various types, namely porous pontoons [44,45], porous boxes [19,46], porous plate [47][48][49], porous pipe/cylinder [50][51][52], and saw porous [18,20].…”

Section: Literature Review / Pregled Literaturementioning

confidence: 99%

Numerical Modeling of Hydrodynamic Performance on Porous Slope Type Floating Breakwater

Sujantoko,

Djatmiko,

Wardhana

et al. 2023

Naše more

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A breakwater is a coastal building that aims to break up or withstand wave energy that enters the beach so that the characteristics of the incoming waves are by calculations and can reduce abrasion on the shoreline. Designing a floating breakwater is very complicated because it depends on many aspects. These fundamental aspects depend on each other, so if one of these aspects changes, the integrity of the floating breakwater structure will also change. One of these aspects is the magnitude of the transmission and reflection coefficients generated by the floating breakwater. This research will study the hydrodynamic performance of floating breakwater due to variations in slope and porosity in reducing and reflecting waves with computational fluid dynamics (CFD). The slope-porous floating breakwater dimension is based on previous experimental data, including a constant water depth of 0.75 m, a wave height of 0.05 - 0.125 m, and a wave period of 1.1 - 2 sec on regular waves. The results of the numerical model validation and experiments on all variations of the floating breakwater model are quite good, which is less than 10% for both wave transmission and reflection. Analysis of the influence of changes in the mooring line angle, the simulation is carried out at an angle of 30 deg to 90 deg and produces an average transmission coefficient of 0.79 and a reflection of 0.21. While the effect of changes in water level elevation (0.85 m, 0.75 m, and 0.65 m) gives a reasonably significant average transmission coefficient of 0.85 and a reflection of 0.13. The mooring line angle will be gentler at high tide, and the transmission and reflection coefficients will be higher. However, the mooring line will loosen at low tide, causing the structure to move more freely and eliminating the function of the floating breakwater itself so that the tidal phenomenon becomes a challenge for coastal experts in designing structures to produce effective and efficient hydrodynamic performance.

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“…In addition, they are built as submerged types to satisfy the requirements of coastal landscapes and ecologies. Submerged breakwaters are heavy and large, and are designed by engineers for different purposes [2]. On the other hand, floating breakwaters have the advantage of lower construction costs compared to submerged breakwaters.…”

Section: Introductionmentioning

confidence: 99%

Bragg Reflections of Oblique Water Waves by Periodic Surface-Piercing and Submerged Breakwaters

Tseng

You

Tsai

2020

JMSE

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The Bragg reflections of oblique water waves by periodic surface-piercing structures over periodic bottoms are investigated using the eigenfunction matching method (EMM). Based on the assumption of small wave amplitude, the linear wave theory is employed in the solution procedure. In the step approximation, the surface-piercing structures and the bottom profiles are sliced into shelves separated by abrupt steps. For each shelf, the solution is composed of eigenfunctions with unknown coefficients representing the wave amplitudes. Upon applying the conservations of mass and momentum, a system of linear equations is obtained and is then solved by a sparse-matrix solver. The proposed EMM is validated by several examples in the literature. Then, the method is applied to solve Bragg reflections of oblique water waves by various surface-piercing structures over periodic bottoms. From the numerical experiments, Bragg’s law of oblique waves was used to predict the occurrences of Bragg resonance.

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Experimental study on the performance characteristics of porous perpendicular pipe breakwaters

Cited by 18 publications

References 16 publications

Pengaruh Parameter Gelombang Terhadap Transmisi Gelombang Pada Pemecah Gelombang Berongga Tipe Tenggelam

Pengaruh Parameter Gelombang Terhadap Transmisi Gelombang Pada Pemecah Gelombang Berongga Tipe Tenggelam

Numerical Modeling of Hydrodynamic Performance on Porous Slope Type Floating Breakwater

Bragg Reflections of Oblique Water Waves by Periodic Surface-Piercing and Submerged Breakwaters

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