Prasetyo, Bonaventura Danis (2016) Kajian Eksperimental Dan Numeris Olah Gerak (Seakeeping) Kapal Crew Boat Orela Dengan Dan Tanpa Foil Belakang. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Perilaku olah gerak kapal di laut (seakeeping) dipengaruhi oleh beberapa hal diantaranya
kecepatan, bentuk badan kapal, dan arah datang kapal terhadap datangnya gelombang. Oleh karena
itu penambahan foil belakang diharapkan mampu memperbaiki olah gerak (seakeeping) dari kapal
Crew Boat Orela, agar kenyamanan penumpang menjadi lebih baik. Dalam tugas akhir ini, kapal
Crew boat Orela dengan dan tanpa foil belakang dianalisa menggunakan metode 3D Diffraction
dan uji eksperimental untuk mendapatkan respons gerakan kapal di gelombang reguler. Beberpa
kondisi pada penelitian ini ditentukan seperti sudut datangnya gelombang (μ) terhadap kapal yakni
pada sudut 180 o, tipe NACA yang digunakan untuk foil belakang adalah NACA 64A212, dan
juga analisa dilakukan pada kondisi kecepatan 0 dan 22 knots. Setelah analisa numeris dan uji
eksperimental dilakukan, dapat diketahui pengaruh penambahan foil belakang kapal terhadap
perubahan gerakan kapal Crewboat Orela. Penelitian ini memfokuskan pada analisa perilaku gerak
kapal Crewboat Orela dengan dan tanpa foil belakang dalam kondisi gelombang reguler maupun
gelombang acak. Berdasarkan hasil pemodelan di gelombang reguler, apabila ditinjau dari gerakan
heave dan pitch, kapal Crewboat Orela dengan menggunakan foil belakang lebih baik
dibandingkan tanpa menggunakan foil belakang, hal tersebut didukung berdasarkan penambahan
foil belakang terhadap hasil analisis spektra respons di gelombang acak pada sea state 4 yakni
tinggi gelombang signifikan (Hs) = 2 m, dapat mengurangi hasil rms heave sebesar 6.3% dan juga
mengurangi rms pitch sebesar 9.7%. ========== Seakeeping of ships is affected by some factors such as velocity, the shape of ship’s body, and
direction of ship against waves. Therefore addition of stern foil is expected to make seakeeping of
Orela Crewboat better so that the passenger’s comfort will also be better. In this thesis, Orela Crew
boat was analyzed using 3D Diffraction method & experimental tests in two different conditions,
the first was using stern foil and the second didn’t, in order to get ship motions in regular wave.
The analysis on this thesis were using some conditions, such heading angle (μ) to ship is 180°, the
type of stern foil used was NACA 64A212, ship’s idle condition, and also ship condition with
velocity (speed) of 22 knots. From the numerical analysis and experimental tests, there were some
effects on ship’s motions from the addition of stern foil. This research was focused on Orela
Crewboat’s motions with and without stern foil on regular wave and random wave. Based on
results from regular wave modeling, Orela Crewboat using stern foil was better at heave motions
and pitch than not using stern foil. This also supported on spectra response analysis result in
random wave at sea state 4, which was wave height signifikan (Hs) equal to 2 m that reduced rms
heave at 6.3 % and rms pitch at 9.7 %.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSPe 623.817 1 Pra k-1 3100017068750 |
| Uncontrolled Keywords: | Crew Boat, Eksperimental , foil belakang, NACA, 3D Diffraction |
| Subjects: | V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM761 Stability of ships |
| Divisions: | Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis |
| Depositing User: | - Davi Wah |
| Date Deposited: | 03 Dec 2019 07:12 |
| Last Modified: | 03 Dec 2019 07:12 |
| URI: | http://repository.its.ac.id/id/eprint/71777 |
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