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A Study on the Calculation of Towing Force for the Disabled Ship and Its Experiments
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 Title & Authors
A Study on the Calculation of Towing Force for the Disabled Ship and Its Experiments
Nam, Taek-Kun; Jung, Chang-Hyun; Kim, Jin-Man; Choi, Hyuek-Jin;
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In this paper, calculation of towing force required to tow the ship and experiments to verify its appropriacy are discussed. Friction, wind and wave-making resistance of vessel are considered to calculate towing force of specified vessel. Propeller resistance is also reflected and it is assumed that the propellers are locked. Node analysis to estimate additional resistance on towline is applied. Total towing force could be obtained by adding the ship's resistance and towline resistance. Experiments with training ship SAE YU DAL was executed to check the effectiveness of calculation methods and some comparison between experiments and calculation results was also done. From the comparative analysis, we confirmed that towing speed is primary terms in the calculation of towing force and propeller resistance is a major elements of ship's resistance with the increasing of towing speed. We can see that additional resistance induced by yawing of ship during towing have to be considered for total tow resistance.
towing force;towline;towing experiments;towing speed;yawing;
 Cited by
Dynamics Identification and Robust Control Performance Evaluation of Towing Rope under Rope Length Variation, Journal of the Korea Society For Power System Engineering, 2016, 20, 2, 58  crossref(new windwow)
Total resistance prediction of an intact and damaged tanker with flooded tanks in calm water, Ocean Engineering, 2017, 130, 83  crossref(new windwow)
Choi, H.J, Kim, E.C(2012), "Development of the ship resistance calculation program for prediction of towing forces for damaged ships", Journal of the Korean Society for Marine Environmental Engineering, Vol. 15, No. 2. pp. 150-155. crossref(new window)

KR, KST(2008), "A study on the safety management policy for large tug and barge", MOMAF, pp. 4-20.

M.A. Vaz, M.H. Patel(1995), "Transient behavior of towed marine cables in two dimensions", Applied Ocean Research, 17, pp. 143-153. crossref(new window)

Nam.T.K, Jung, C.H, Jeong.J.S(2012), "A Study on the calculation of resistance of the ship to be towed and towline tension", Journal of Navigation and Port Research, Vol. 36, No. 8, pp. 607-612. crossref(new window)

The Society of Naval Architects of Korea(2009), "Ship's resistance and propulsion", Jisung Publishing Co., pp. 16-86.

U.S.Navy Towing Manual(2002), U.S.Naval Sea Systems Command, SL740-AA-MAN-010.