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http://dx.doi.org/10.7837/kosomes.2014.20.4.405

A Study on the Necessary Thrust of Tugs through the Ship's Towing Test  

Jung, Chang-Hyun (Mokpo National Maritime University)
Nam, Taek-Kun (Mokpo National Maritime University)
Choi, Hyuek-Jin (Korea Institute of Ocean Science & Technology)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.20, no.4, 2014 , pp. 405-411 More about this Journal
Abstract
It needed the calculation of the required tugboat's power to move the damaged vessel to the safe area for reducing the additional damages. In this paper, it was verified the theoretical calculation method on the required power of tugboat through the 93m real ship tests. From the experiments, it was considered that the theoretical calculation method was sufficient to estimate the required power of tugboat. The resistance of the locked propeller was relatively big portions compared with other static resistances such as air resistance, frictional resistance and residual resistance. And dynamic resistance induced by swing movement and yawing was continuously occurred and it also was great effects on the total resistance. In the future, the safety factor will be considered and the exact prediction of ship's resistance will enhance the efficiency of tugboat because of the minimization of safety factor.
Keywords
Required tugboat's power; Real ship tests; Theoretical calculation method; Static resistance; Dynamic resistance; Safety factor;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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