Masro'i, Ngizuddin (2020) Analisis Pengaruh Peletakan Main Engine dan Variasi Sudut Kemiringan Poros Propeller Terhadap Performa Kapal. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Umumnya pada tahap perhitungan tahanan dan propulsi kapal hanya memperhitungkan desain lambung kapal tanpa memperhitungkan peletakan dari komponen sistem propulsi kapal. Padahal peletakan komponen sistem propulsi kapal tersebut kemungkinan juga dapat mempengaruhi nilai tahanan dan thrust kapal. Termasuk dalam peletakan komponen sistem propulsi kapal tersebut adalah peletakan main engine dan kemiringan poros propeller. Perubahan peletakan main engine akan mempengaruhi letak titik pusat gravitasi kapal yang berpengaruh terhadap trim dan besarnya tahanan kapal. Sementara kemiringan poros propeller akan berpengaruh terhadap arah thrust yang dihasilkan propeller. Arah thrust tersebut akan sejajar dengan poros propeller sehingga akan memiliki dua komponen gaya yaitu gaya horizontal yang akan menggerakkan kapal dan gaya vertikal yang memberikan gaya angkat pada bagian tertentu pada kapal. Gaya angkat tersebut akan mempengaruhi trim dari kapal yang akan berdampak terhadap tahanan yang terjadi pada kapal. Pada penelitian ini akan dilakukan analisis terhadap seberapa besar pengaruh peletakan main engine dan sudut kemiringan poros propeller pada beberapa variasi sudut kemiringan untuk kapal ikan 60 GT terhadap performa kapal dengan menggunkan simulasi. Simulasi dilakukan dengan software Numeca Fine Marine dengan metode Actuator Disk Propeller. Variasi sudut kemiringan poros propeller adalah 1⁰, 2⁰,3⁰, dan 4⁰. Pada setiap sudut kemiringan poros propeller terdapat dua variasi peletakan main engine yaitu pada jarak 4m-6.5m dari AP dan 5.5m-8m dari AP. Berdasarkan hasil simulasi yang telah dilakukan, semakin besar sudut kemiringan poros propeller maka nilai tahanan akan menjadi semakin kecil, dan gaya dorong yang dihasilkan juga semakin kecil. Ketika main engine digeser ke arah FP, maka nilai tahanan akan menjadi semakin besar, dan gaya dorong yang dihasilkan juga semakin besar. Kondisi paling optimal adalah pada kemiringan poros propeller 4⁰ dan posisi main engine 4m-6.5m dari AP, di mana nilai tahanan total kapal = 9648.97 N dan gaya dorong = 16520.66, torsi = 1867.46, KT = 0.1569, KQ=0.0177, J=0.2827 dan efisiensi propulsi = 0.3991. Konfigurasi tersebut dipilih karena untuk membuat kapal bergerak pada kecepatan yang sama, konfigurasi tersebut membutuhkan daya yang lebih kecil.
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Generally, in the phase of the ship resistance and propulsion calculation only takes into account the design of the hull without taking into account the placement of the ship propulsion system components. Even though the placement of the ship propulsion system components might also affect the value of the ship's resistance and thrust. Included in the placement of the ship's propulsion system components are the placement of the main engine and propeller shaft inclination. Changes in the placement of the main engine will affect the location of the center of gravity of the ship which affects the trim and the amount of resistance of the ship. While the slope of the propeller shaft will affect the direction of thrust produced by the propeller. The direction of the thrust will be parallel to the propeller shaft so that it will have two force components namely the horizontal force that will move the ship and the vertical force that gives lift to certain parts of the ship. The lift will affect the trim of the ship which will have an impact on the resistance that occur on the ship. In this study, an analysis of how big the effect of the placement of the main engine and the propeller shaft inclination on various inclination angles for the fishing vessel 60 GT on the ship's performance by using simulation. Simulations were performed with Numeca Fine Marine software using the Actuator Disk Propeller method. Propeller shaft inclination variations are 1⁰, 2⁰, 3⁰, and 4⁰. At each propeller shaft inclination there are two variations of the placement of the main engine at a distance of 4m-6.5m from the AP and 5.5m-8m from the AP. Based on the results of the simulation that has been done, the greater the angle of the propeller shaft inclination, the resistance value will be even smaller, and the thrust produced is also smaller. When the main engine is shifted towards FP, the resistance value will be greater, and the thrust generated is also greater. The most optimal conditions are on the rake of the propeller shaft 4⁰ and the main engine position 4m-6.5m from the AP, the total resistance value of the ship = 9648.97 N and the thrust = 16520.66, torque = 1867.46, KT = 0.1569, KQ = 0.0177, J = 0.2827 and propulsion efficiency = 0.3991. This configuration was chosen because to make the ship move at the same speed, the configuration requires less power.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Kemiringan Poros Propeller, Peletakan Main Engine, Tahanan, Thrust |
| Subjects: | T Technology > T Technology (General) > T57.62 Simulation V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering V Naval Science > VM431 Fishing boats V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM751 Resistance and propulsion of ships |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Ngizuddin Masro'i |
| Date Deposited: | 03 Oct 2024 05:53 |
| Last Modified: | 03 Oct 2024 05:53 |
| URI: | http://repository.its.ac.id/id/eprint/73323 |
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