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http://dx.doi.org/10.7837/kosomes.2021.27.6.832

A Study on Motion Response of Small Fishing Vessels According to Various Tonnage in Regular Waves  

Im, Nam-Kyun (Division of Navigation Science, Mokpo National Maritime University)
Lee, Sang-Min (Division of Marine Industry Transportation Science and Technology, Kunsan National University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.27, no.6, 2021 , pp. 832-838 More about this Journal
Abstract
Recently, reports of marine accidents of small fishing vessels less than 10 tons have been increasing. In this study, the characteristics of the motion response in regular waves were analyzed using computations for these ships. Small vessels less than 10 tons are classified by size and used for marine accident investigations. Therefore, the motion response analysis was performed on three small fishing vessels of different sizes. In the case of the head sea, it was confirmed that as the speed of the vessel increased in the long wavelength region, the motion responses of heave and pitch became large. The motion response of the smallest 3-ton fishing vessel was greater than that of the other sizes of fishing vessels. The maximum value of the roll motion shifted to the long wavelength region as the speed gradually increased in the bow sea, regardless of the size of the ship. In all the three small fishing vessels, it was found that the roll motion was the greatest at 15 knots, the highest speed in both bow and beam seas. When sailing in the head sea and bow sea conditions, lowering the speed is one of the effective approaches to reduce the effects of the vertical and lateral plane motions. The roll motion caused by the beam wave showed a tendency to increase rapidly only at a specific wavelength regardless of the speed and the size of the vessel. It was confirmed that the roll motion was significantly reduced with forward speed in the stern wave compared to the bow wave. As there is a specific region where the maximum value of the hull motion response appears depending on the size and speed of the ship, an operation method that can minimize the effect of this motion should be considered and implemented.
Keywords
Small fishing vessel; Regular waves; Numerical calculation; Heave; Pitch; Roll;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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