Studi Eksperiment Efektivitas Peredam Gelombang Pada Floating Breakwater Double Pontoon Dengan Sistem Penegar dan Pontoon Berpori

Salman, Muhammad (2026) Studi Eksperiment Efektivitas Peredam Gelombang Pada Floating Breakwater Double Pontoon Dengan Sistem Penegar dan Pontoon Berpori. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Floating breakwater double pontoon (FBDP) merupakan struktur pelindung pantai yang berfungsi meredam energi gelombang. Penelitian ini bertujuan menganalisis pengaruh jarak antar pontoon, slope dan porositas pontoon, serta sistem penegar terhadap respons hidrodinamika yang ditinjau dari koefisien transmisi (KT) dan koefisien refleksi (KR). Metode yang digunakan adalah eksperimen fisik laboratorium pada enam model floating breakwater dengan variasi space 50 cm, 75 cm, 100 cm, dan 125 cm. Hasil penelitian menunjukkan bahwa efektivitas redaman gelombang dipengaruhi oleh konfigurasi geometri dan sistem penegar. Pada model dengan penegar, pelebaran space mampu menurunkan KT hingga 13%, sedangkan pada model tanpa penegar KT cenderung meningkat sebesar 3–5%. Penggunaan slope lebih efektif menurunkan KT dibandingkan porositas, dengan reduksi mencapai 13–19%, sedangkan porositas lebih efektif menurunkan KR hingga 39–59%. Selain itu, sistem penegar terbukti menurunkan KT sebesar 14–29% dan meningkatkan KR sebesar 16–74% dibandingkan model tanpa penegar. Hasil ini menunjukkan bahwa penegar meningkatkan stabilitas struktur sehingga kemampuan redaman gelombang menjadi lebih baik. Secara keseluruhan, kombinasi slope, porositas, pengaturan space, dan sistem penegar yang tepat mampu meningkatkan kinerja floating breakwater tipe double pontoon dalam meredam energi gelombang.
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Floating breakwater double pontoon (FBDP) is a coastal protection structure designed to attenuate wave energy. This study aims to analyze the effects of pontoon spacing, pontoon slope and porosity, and the use of a stiffening system on the hydrodynamic response of a double-pontoon floating breakwater, as evaluated through the transmission coefficient (KT) and reflection coefficient (KR). An experimental laboratory approach was employed using six floating breakwater models with spacing variations of 50 cm, 75 cm, 100 cm, and 125 cm. The results indicate that wave attenuation performance is strongly influenced by geometric configuration and the stiffening system. In models equipped with stiffeners, increasing pontoon spacing reduced KT by up to 13%, whereas in models without stiffeners, KT tended to increase by 3–5%. The slope configuration was found to be more effective in reducing KT than pontoon porosity, achieving a reduction of 13–19%, while porosity was more effective in reducing KR, with reductions ranging from 39% to 59%. Furthermore, the stiffening system consistently reduced KT by 14–29% and increased KR by 16–74% compared to models without stiffeners. These findings demonstrate that the stiffening system enhances structural stability and improves wave attenuation performance. Overall, the combination of slope, porosity, optimal pontoon spacing, and a stiffening system significantly improves the effectiveness of double-pontoon floating breakwaters in dissipating wave energy.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Double pontoon floating breakwater, porositas peredam, jarak celah, geometri ponton, koefisien transmisi, koefisien refleksi, Sistem kaku. Double pontoon floating breakwater, damper porosity, gap distance, pontoon geometry, transmission coefficient, reflection coefficient, Rigid system.
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures 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 > 38101-(S2) Master Thesis
Depositing User:	Muhammad Salman
Date Deposited:	22 Jul 2026 02:41
Last Modified:	22 Jul 2026 02:41
URI:	http://repository.its.ac.id/id/eprint/136124

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