Pemodelan Fisik dan Numerik Hidrodinamika Breakwater terhadap Variasi Concrete Armour Unit

Iman, Muhammad Rizki Firmandha (2025) Pemodelan Fisik dan Numerik Hidrodinamika Breakwater terhadap Variasi Concrete Armour Unit. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Breakwater adalah struktur pelindung yang dibangun di pantai atau di laut lepas untuk melindungi kawasan pesisir dari gelombang laut dan erosi. Penelitian ini menggunakan metode uji fisik dan numerik menggunakan software DualSPHysics dengan 4 variasi tinggi gelombang (H) 13,1 cm, 11,9 cm, 9,5 cm, 8,3 cm dan 2 variasi periode gelombang (T) 1,3 s dan 1,7 s. Serta concrete armour yang digunakan yaitu batu pecah, beton berpori, dan a-jack dengan kemiringan struktur 1:1,5. Untuk memenuhi fungsinya, perencanaan breakwater dilakukan untuk mengantisipasi adanya rayapan gelombang pada struktur (Runup), daya pantulan gelombang pada struktur dari jenis unit armour yang dipakai (refleksi), dan mengetahui efektifitas dari kinerja struktur breakwater tersebut (transmisi). Didapatkan hasil pada penelitian ini baik uji fisik ataupun uji numerik yaitu concrete armour beton berpori paling efektif dibandingkan concrete armour lainnya. Selain itu, nilai pengujian hidrodinamika breakwater akan berkurang atau kecil apabila kecuraman gelombang dan tinggi gelombang meningkat. Pada eksplorasi uji numerik kedalaman air 0,75 m, nilai hidrodinamika cenderung lebih besar dibandingkan kedalaman air 0,65 m. Hal ini menunjukkan bahwa peningkatan kedalaman air menyebabkan energi gelombang yang lebih tinggi mencapai struktur, sehingga menghasilkan nilai tinggi.
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A breakwater is a protective structure built along the coast or offshore to safeguard coastal areas from ocean waves and erosion. This study employs physical and numerical testing methods using the DualSPHysics software with four wave height (H) variations: 13.1 cm, 11.9 cm, 9.5 cm, and 8.3 cm, as well as two wave period (T) variations: 1.3 s and 1.7 s. The concrete armors used are rubble stones, porous concrete, and A-Jacks, with a structural slope of 1:1.5. To achieve its function, breakwater design planning is carried out to anticipate wave run-up on the structure, the wave reflection on the structure based on the type of armor units used, and to determine the effectiveness of the breakwater's performance (transmission). The results of this study, both from physical and numerical tests, indicate that the hydrodynamic performance of the breakwater decreases as wave steepness and wave height increase. In the numerical test exploration with a water depth of 0.75 m, hydrodynamic values tend to be higher compared to a water depth of 0.65 m. This shows that an increase in water depth causes higher wave energy to reach the structure, resulting in greater values.

Item Type: Thesis (Other)
Uncontrolled Keywords: Breakwater, concrete armour, Hidrodinamika, Breakwater, Concrete armour, Hydrodynamics
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering > TC333 Breakwaters
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Muhammad Rizki Firmandha Iman
Date Deposited: 22 Jan 2025 00:52
Last Modified: 22 Jan 2025 00:52
URI: http://repository.its.ac.id/id/eprint/116471

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