Model Gelombang Di Sekitar Artificial Hexareef Sebagai Submerged Breakwater Menggunakan DUALSPHYSICS

Manurung, Adelbert (2021) Model Gelombang Di Sekitar Artificial Hexareef Sebagai Submerged Breakwater Menggunakan DUALSPHYSICS. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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04311740000048_Undergraduate_Thesis.pdf - Accepted Version
Restricted to Repository staff only

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Abstract

Perkembangan fungsi dan kegunaan terumbu karang buatan (artificial reef) sudah berkembang dari fungsi utama sebagai salah satu metode dalam merekondisi terumbu karang asli, menjadi salah satu struktur bangunan pemecah gelombang ambang rendah (submerged breakwater). Terumbu buatan dapat mengurangi beban hidrolik di pantai ke tingkat yang dibutuhkan untuk menjaga keseimbangan garis pantai. Penelitian ini menggunakan terumbu buatan berbentuk hexagonal dengan 6 lobang pada masing masing sisinya. Penelitian ini dilakukan pada Numerical Wave Tank menggunakan metode Smoothed Particle Hydrodynamic (SPH) untuk melihat pengaruh gap antar struktur sebesar 0.15 m, 0.112 m, dan 0 m dengan konfigurasi yang sudah ditentukan terhadap nilai koefisien transmisi (Kt). Dalam penelitian ini didapatkan bahwa konfigurasi dengan gap sebesar 0 m mampu meredam gelombang dengan lebih baik dibandingkan dengan konfigurasi dengan gap 0.15 m, dan 0.112 m berdasarkan dari nilai Kt yang didapatkan. Dalam aspek hidrodinamika didapatkan bahwa : (1) Semakin bertambah kemiringan gelombang, maka nilai Kt yang diperoleh semakin kecil, (2) Semakin besar tinggi gelombang maka nilai Kt semakin kecil pada kedalaman freeboard 0.1 m, sedangkan pada freeboard dengan kedalaman 0.2 m dan 0.3 m didapatkan bahwa semakin besar tinggi gelombang, maka nilai Kt semakin besar, (3) Semakin besar periode gelombang, maka nilai Kt semakin besar, (4) semakin tinggi kedalaman freeboard, maka nilai Kt bertambah besar. Sedangkan dalam segi aspek struktur didapatkan : semakin besar lebar puncak relatif (B/ ), maka nilai Kt akan bertambah kecil. ================================================================================================ The development of the functions and uses of artificial reefs has evolved from its main function as a method in reconditioning real reefs, to becoming a submerged breakwater structure. Artificial reefs can reduce the hydraulic load on the coast to the level required to maintain shoreline balance. This research used hexagonal-shaped artificial reef with 6 holes on each side. This research was conducted on a Numerical Wave Tank using the Smoothed Particle Hydrodynamic (SPH) method to see the effect of gaps between structures of 0.15 m, 0.112 m, and 0 m with a predetermined configuration on the value of the transmission coefficient (Kt). In this research, it was found that the configuration with a gap of 0 m was able to absorb waves better than the configuration with a gap of 0.15 m, and 0.112 m based on the Kt value obtained. In the hydrodynamic aspect, it was found that: (1) The more the slope of the wave increases, the smaller the Kt value obtained, (2) The greater the wave height, the smaller the Kt value at a freeboard depth of 0.1 m, while on a freeboard with a depth of 0.2 m and 0.3 m, it is found that the greater the wave height, the greater the value of Kt, (3) The greater the wave period, the greater the value of Kt, (4) the higher the depth of the freeboard, the greater the value of Kt. Meanwhile, in terms of structural aspects, it is obtained that: the greater the relative peak width (B/〖gT〗^2), the smaller the value of Kt will be.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Terumbu Karang Buatan, Numerical Wave Tank, Smoothed Particle Hydrodynami, Transmisi, Refleksi, Artificial Reefs, Numerical Wave Tank, Smoothed Particle Hydrodynami, Transmission, Reflection
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TC Hydraulic engineering. Ocean engineering > TC333 Breakwaters
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Adelbert Manurung
Date Deposited: 18 Aug 2021 14:39
Last Modified: 18 Aug 2021 14:39
URI: https://repository.its.ac.id/id/eprint/87387

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