Analisis Respons Dinamis pada Sistem Hybrid Floating Breakwater-Aquaculture dengan Metode Numerik dan Eksperimen

Saputra, Arta Gaed (2026) Analisis Respons Dinamis pada Sistem Hybrid Floating Breakwater-Aquaculture dengan Metode Numerik dan Eksperimen. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan kebutuhan akan infrastruktur perlindungan pantai yang ramah lingkungan mendorong pengembangan hybrid floating breakwater–aquaculture sebagai struktur multifungsi yang mampu meredam energi gelombang sekaligus mendukung kegiatan budidaya laut. Penelitian ini bertujuan untuk menganalisis respons hidrodinamika sistem hybrid floating breakwater–aquaculture melalui pendekatan eksperimen fisik dan simulasi numerik, serta mengevaluasi tingkat kesesuaian kedua metode dalam menentukan koefisien transmisi (KT) dan koefisien refleksi (KR) gelombang. Penelitian dilakukan menggunakan empat variasi model floating breakwater dengan kombinasi porositas dan penambahan struktur aquaculture. Pengujian eksperimen dilaksanakan di flume tank menggunakan gelombang reguler, sedangkan pemodelan numerik dilakukan menggunakan perangkat lunak DualSPHysics. Analisis kinerja struktur dilakukan berdasarkan nilai koefisien transmisi dan koefisien refleksi terhadap parameter wave steepness (H/gT²), kemudian hasil simulasi numerik divalidasi terhadap hasil eksperimen. Hasil penelitian menunjukkan bahwa seluruh konfigurasi hybrid floating breakwater–aquaculture mampu mereduksi energi gelombang. Variasi floating breakwater tanpa porositas dengan penambahan struktur aquaculture memberikan performa terbaik dengan nilai rata-rata koefisien transmisi sebesar 0,70 pada eksperimen dan 0,69 pada simulasi numerik. Penambahan struktur aquaculture meningkatkan efektivitas peredaman gelombang dengan penurunan nilai KT sebesar 2,35% pada eksperimen dan 0,89% pada simulasi numerik, sedangkan variasi porositas memberikan pengaruh yang relatif lebih kecil. Validasi antara hasil eksperimen dan simulasi menunjukkan kesesuaian yang baik dengan rata-rata galat sebesar 2,1% untuk koefisien transmisi dan 8,2% untuk koefisien refleksi. Hasil tersebut menunjukkan bahwa DualSPHysics mampu merepresentasikan fenomena hidrodinamika sistem hybrid floating breakwater–aquaculture dengan baik sehingga dapat digunakan sebagai metode pendukung dalam pengembangan dan optimasi desain struktur pelindung pantai multifungsi.
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The increasing demand for environmentally sustainable coastal protection infrastructure has encouraged the development of hybrid floating breakwater–aquaculture systems, which integrate wave attenuation with offshore aquaculture activities. This study aims to analyze the hydrodynamic response of a hybrid floating breakwater–aquaculture system using both experimental and numerical approaches and to evaluate the agreement between the two methods in determining the wave transmission coefficient (KT) and reflection coefficient (KR). The study was conducted using four floating breakwater configurations with different porosity conditions and the addition of an aquaculture structure. Physical experiments were carried out in a wave flume under regular wave conditions, while numerical simulations were performed using DualSPHysics. The hydrodynamic performance of each configuration was evaluated based on the transmission and reflection coefficients with respect to the wave steepness parameter (H/gT²). Furthermore, the numerical results were validated against the experimental measurements. The results indicate that all hybrid floating breakwater–aquaculture configurations were capable of reducing wave energy. The nonporous floating breakwater equipped with an aquaculture structure exhibited the best performance, with an average transmission coefficient of 0.70 in the experimental tests and 0.69 in the numerical simulations. The incorporation of the aquaculture structure improved the wave attenuation performance by reducing the transmission coefficient by 2.35% in the experimental results and 0.89% in the numerical simulations, whereas the effect of structural porosity was comparatively less significant. Validation between the experimental and numerical approaches demonstrated good agreement, with average errors of 2.1% for the transmission coefficient and 8.2% for the reflection coefficient. These findings indicate that DualSPHysics is capable of accurately reproducing the hydrodynamic behavior of the hybrid floating breakwater–aquaculture system and can be effectively utilized as a supporting tool for the design and optimization of multifunctional coastal protection structures.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	floating breakwater, aquaculture, koefisien transmisi, koefisien refleksi, hidrodinamika. floating breakwater, aquaculture, transmission coefficient, reflection coefficient, hydrodynamics
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC333 Breakwaters T Technology > TC Hydraulic engineering. Ocean engineering > TC363 Floating harbors. Including floating docks, piers, etc
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Arta Gaed Saputra
Date Deposited:	23 Jul 2026 08:45
Last Modified:	23 Jul 2026 08:45
URI:	http://repository.its.ac.id/id/eprint/137191

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