Analisa Slamming, Greenwater, dan Propeller Racing Sadewa Police Patrol Boat

Alifiani, Indri (2017) Analisa Slamming, Greenwater, dan Propeller Racing Sadewa Police Patrol Boat. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Berkembangnya teknologi eksploitasi dan eksplorasi hasil kekayaan maritim yang semakin pesat mengakibatkan keamanan maritim semakin kompleks dan longgar
karena belum didukung dengan kapasitas pengawasan. Patrol Boat adalah salah
satu jenis kapal cepat yang digunakan untuk mengawasi dan menjaga keamanan
perairan di suatu wilayah. Pada saat beroperasi Patrol Boat dihadapkan dengan
berbagai kondisi lingkungan yang dapat menyebabkan terganggunya stabilitas dan operabilitas. Dalam penelitian ini ditujukan untuk mengetahui dan memprediksi peluang kejadian slamming, greenwater dan propeller racing yang terjadi pada Patrol Boat. Tahap pertama yang dilakukan adalah pemodelan Patrol Boat
dengan bantuan software MAXSURF untuk mendapatkan linesplan. Kemudian dilanjutkan pemodelan menggunakan software MOSES untuk mendapatkan Response Amplitude Operator (RAO). Hasil analisis RAO dari software MOSES digunakan untuk menganalisis gerak relatif vertikal haluan pada gelombang
reguler. RAO gerak relatif vertikal haluan akan ditransformasikan menjadi
karakteristik di gelombang acak, yaitu dengan melakukan analisis spektra.
Selanjutnya dilakukan komputasi untuk mengetahui peluang kejadian slamming,
greenwater, dan propeller racing. Peluang slamming dan greenwater terbesar
terjadi pada saat kapal melaju dengan kecepatan 18 knot dan pada saat kondisi arah datang gelombang 180º dengan tinggi gelombang signifikan 6 meter, yaitu
sebesar 82.187% slamming dan 74,013% greenwater. Peluang propeller racing
sebesar 94.437%, terjadi pada frekuensi RAO 1.0472 rad/s antara waktu 3.1 s sampai 5.7 s, dengan kondisi propeller 100% mengangkat ke atas permukaan air.
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The development of exploitation technology and exploration of maritime wealth that increases rapidly has caused maritime security increasingly complex and loose because it has not been supported by the capacity of supervision. Patrol Boat
is one of fast boat that is used to supervise and maintain the safety of waters in a region. At the time of operation Patrol Boat faced with various environmental
conditions that can cause disruption of stability and operability. This study aimed
to determine and predict the probability of slamming, greenwater and propeller racing events that occurred in Patrol Boat. The first stage is Patrol Boat modeling
with MAXSURF software to get linesplan. Afterward, proceed with modeling using MOSES software to get Response Amplitude Operator (RAO). The result of RAO analysis of MOSES software is used to analyze the relative vertical bow
motion on a regular wave. The relative motion RAO of the bow will be transformed into characteristic in random waves by conducting spectral analysis.
Furthermore, computation is done to know the probability of slamming, greenwater, and propeller racing. The greatest slamming and greenwater opportunity occurs when the ship speeds at 18 knots and when the direction conditions come 180º waves with a significant 6 meters waves, which is 82.187% slamming and 74.013% greenwater. 94.437% Propeller racing opportunities occur at RAO frequency 1.0472 rad / s between 3.1 s to 5.7 s, with 100% propeller
condition lifting up the water surface.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	greenwater, patrol boat, propeller racing, RAO, slamming
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Indri Alifiani .
Date Deposited:	16 Jan 2018 03:33
Last Modified:	16 Jan 2018 03:33
URI:	http://repository.its.ac.id/id/eprint/45007

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