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http://dx.doi.org/10.7837/kosomes.2017.23.6.613

Study on Hydrodynamic Forces Acting on a Very Large Container Vessel at Lower Depths in Both Still Water and Waves  

Lee, Sangmin (Dept. of Marine Science and Production, Kunsan National University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.23, no.6, 2017 , pp. 613-619 More about this Journal
Abstract
Recently, the size of container ships has been progressively increasing, and much attention is required for safe navigation in shallow areas such as coastal waters and ports due to increases in draft. It is necessary to understand the characteristics of ship motion not only in still waters but also with waves. Especially in shallow regions, squat due to the vertical movement of the ship can be an important evaluation factor for the safe navigation, and wave drift force acting in the horizontal direction can have a great influence on the maneuverability of a ship. In this study, a numerical simulation using computational fluid dynamics has been performed for the wave exciting force acting in the vertical direction and the wave drift force acting in the horizontal direction for a very large container vessel sailing in shallow zone. As a result, it was found that total resistance in still waters greatly increased in shallow water. Wave drift force was shown to decrease given longer wavelengths regardless of water depth. It was observed that the wave exciting force in shallow water was considerably larger than at other water depths. As wave height against the central part of the ship lowered, the aft side rose.
Keywords
Very large container vessel; Low water depth; Squat; Wave drift force; Wave exciting force; Computational fluid dynamics;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 El Moctar, O., V. Shigunov and T. Zorn(2012), Duisburg Test Case: Post-Panamax Container Ship for Benchmarking, Ship Technology, Res 59(3), pp. 50-64.
2 Faltinsen, O. M.(1998), Sea Loads on Ships and Offshore Structure, Cambridge University Press, p. 145.
3 Jachowski, J.(2008), Assessment of Ship Squat in Shallow Water Using CFD, Archives of Civil and Mechanical Engineering, Vol. 8, No. 1, pp. 27-36.   DOI
4 Kijima, K., R. Tanaka, Y. Furukawa and T. Kaneko(2001), Simple Prediction Method on Squat, Transactions of the West-Japan Society of Naval Architects, No. 103, pp. 101-110.
5 Lee, S. W.(2015), A Study on the Manoeuvrability as Function of Stern Hull Form in Shallow Water, Journal of the Korean Society of Marine Environment & Safety, Vol. 21, No. 5, pp. 552-557.   DOI
6 Oortmerssen, G. V.(1976), The Motions of a Ship on Shallow Water, Ocean Engineering, Vol. 3, pp. 221-255.   DOI
7 PIANC(1992), Capability of Ship Manoeuvring Simulation Models for Approach Channels and Fairways in Harbours. Report of Working Group No. 20 of Permanent Technical Committee , Supplement to PIANC Bulletin No. 77.
8 Ruiz, M. T., S. De Caluwe, T. Van Zwijusvooorde, G. Delefortrie and M. Vantorre(2015), Wave Effects in 6DOF on a Ship in Shallow Water, MARSIM 2015.
9 Tezdogan, T., A. Incecik and O. Turan(2016a), A Numerical Investigation of the Squat and Resistance of Ships Advancing through a Canal Using CFD, Journal of Marine Science and Technology, Vol. 21, No. 1, pp. 86-101.   DOI
10 Sung, Y. J. and S. H. Park(2015), Prediction of Ship Manoeuvring Performance Based on Virtual Captive Model Tests, Journal of the Society of Naval Architects of Korea, Vol. 52, No. 5, pp. 407-417.   DOI
11 Tezdogan, T., A. Incecik and O. Turan(2016b), Full-scale Unsteady RANS Simulations of Vertical Ship Motions in Shallow Water, Ocean Engineering, Vol. 123, pp. 131-145.   DOI
12 Gourlay, T.(2008), Slender-Body Methods for Predicting Ship Squat, Ocean Engineering, Vol. 35, No. 2, pp. 191-200.   DOI
13 Yun, K. H., B. J. Park and D. J. Yeo(2014), Experimental Study of Ship Squat for KCS in Shallow Water, Journal of the Society of Naval Architects of Korea, Vol. 51, No. 1, pp. 34-41.   DOI
14 Yao, J. X. and Z. J. Zou(2010), Calculation of Ship Squat in Restricted Waterways by Using a 3D Panel Method, 9th International Conference on Hydrodynamics, pp. 489-493.