Seakeeping Analysis of Hull Rounded Design With Multi-Chine Model on Fishing Vessel

Abstract

This research is to find out the hydrodynamic characteristics of a ship, it presented in the form of the characteristics of the movements that are usually experienced by the ship when sailing. Therefore, testing the motion performance of 3 GT fishing vessels is done by calculating the ship’s response to ocean waves, following the oceans and oceanic which cause oscillation movements in 3 degrees of freedom of ship compilation in the waters of the Malacca Strait. The object of the research model is 3 GT fishing vessel with a hull shape rounded by varying the amount of chine. The Rounded model and the Chine model are analyzed using motion to find out RAO ships such as heaving, rolling and pitching. RAO size for maximum heave motion occurs at a speed of 12 knots in the direction of 135° with a RAO value of 1.60 m/m with a frequency of 3.03 rad/s, the RC-2 Ship model with a frequency of 3,015 rad / s and a RH model ship and with a critical peak value of RAO heave 1,713 m with a frequency of 3.15 rad/s, the maximum roll value occurs wave angle 90° beam sea with RAO value ship model RC-3 is at the lowest point with a critical peak value of RAO roll 6.3048 deg/m with a frequency of 2.306 rad / s, the RC-2 Ship model with a frequency of 6,3048 rad / s and a RH model ship and with a critical peak value of RAO roll 6,405 m with a frequency of 3.092 rad/s. In RAO pict movements heading angle 180° head sea, RC-3 ship model is at the lowest point with a critical peak value of RAO roll 1.35 deg/m with a frequency of 2.93 rad / s, the RC-2 Ship model with a frequency of 1,45 rad/s with a frequency of 2.936 rad/s, and a RH model ship and with a critical peak value of RAO roll 1,843 m with a frequency of 3.015 rad/s. From the results of the study it can be concluded that the RC-3 type of fish has a good performance when used at sea.