Kajian Eksperimental Dan Numeris Olah Gerak (Seakeeping) Kapal Crew Boat Orela Dengan Dan Tanpa Foil Belakang

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 > 36202-(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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