Analisa Permodelan Gelombang Transmisi pada Floating Breakwater di Pelabuhan LNG Senoro, Banggai, Sulawesi Tengah

Putra, Chandra Maha (2016) Analisa Permodelan Gelombang Transmisi pada Floating Breakwater di Pelabuhan LNG Senoro, Banggai, Sulawesi Tengah. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Senoro Gas Development Project yang berlokasi di Senoro, Kabupaten Banggai, Sulawesi Tengah adalah salah satu bagian dari proyek bersama antara PT. Pertamina dan PT. Medco E&P dalam bidang eksplorasi migas. Berdasarkan hasil survey oleh PT.Surveyor Indonesia pada ujung jetty Pelabuhan Senoro menunjukan ketinggian gelombang signifikan masih setinggi 2,7 meter, sedangkan persyaratan berlabuh untuk kapal berukuran lebih besar dari 50.000 DWT adalah ketinggian gelombang pada pelabuhan antara 0,7-1,5 meter (CDIT, 2004). Sehingga diperlukan suatu bangunan penahan gelombang. floating breakwater menjadi salah satu solusi untuk mengurangi ketinggian gelombang pada kasus ini. Untuk melihat performa floating breakwater dilihat dari nilai koefisien transmisi (Kt) yang dihasilkan untuk itu dilakukan analisa menggunakan software computational fluid dynamic (CFD), hasil analisa pada model awal floating breakwater dengan ukuran panjang 30 meter, lebar 20 meter dan tinggi 16 meter dengan tinggi freeboard 1 meter dihasilkan Kt 0,77 dan belum memenuhi standart keamanan sebesar ≤ 0,56. Setelah dilakukan modifikasi jarak floating breakwater terhadap jetty ditemukan jarak yang menghasilakan nilai Kt yang memenuhi syarat keamanan yakni pada jarak 600 meter dengan nilai Kt= 0,55. Selain itu untuk mencari nilai Kt yang aman dilakukan penambahan ketinggian freeboard, permodelan 1 dengan menambahkan balok trapesium di atas breakwater dengan penambahan ketinggian 3 meter dicapai nilai koefisien transmisi aman dengan nilai Kt= 0,45. Dengan permodelan 2 dengan menambahkan dua buah balok trapesium di atas breakwater pada pada penambahan ketinggian 2 meter dicapai nilai koefisien transmisi aman dengan nilai Kt = 0,48. ======================================================================================================== Senoro Gas Development Project which located in Senoro, Banggai city, Central Sulawesi are joint operation project between PT.Pertamina dan PT.Medco E&P in gas exploration sector. Senoro Port is one of the gas distribution Facility which built with 500 meters jetty to accomodate gas carrier and large ship in order to distribute gas. According to survey data from PT.Surveyor Indonesia, the height of significant wave height in end of the jetty is 2,7 meters. While the wave height requirement for 50.000 DWT ship is 0,7-1,5 meters. Therefore, this port need some breakwater structures in order to reducing wave height in this port. In order to answer these problems, floating breakwater can be a solution for reducing wave height in this port. In order to see the performance of a floating breakwater, using the value of the coefficient transmission (Kt) obtained from the analysis using software Computational Fluid Dynamic (CFD), the analysis results in an early model of floating breakwater with a length of 30 meters, width 20 meters and height 16 meters with a height of free surface 1 meter produced coefficient transmission value 0.77 that do not meet the safety standards of ≤ 0.56. After the modification of the distance floating breakwater towards the jetty is found within that produce value coefficient transmission qualified security, that is at a distance of 600 meters with a value of coefficient transmission 0.55. In order to gain a safe value coefficient transmission , from model 1 by increasing the height of trapezoidal beam on the breakwater by 3 meters, we obtained secure coefficient transmission value 0.45 . From model 2 by increasing the height of two trapezoidal beams over breakwater by 2 meters, we obtained secure coefficient transmission value 0,48.

Item Type: Thesis (Undergraduate)
Additional Information: RSKe 623.812 Put a
Uncontrolled Keywords: floating Breakwater, Pelabuhan, Computational Fluid Dynamic (CFD),koefisien transmisi
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 20 Feb 2018 06:57
Last Modified: 27 Dec 2018 04:24
URI: http://repository.its.ac.id/id/eprint/51302

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