Numerical Study on Change of Added Resistance due to Incident Waves in Finite Water Depth
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 145, Issue 6
Abstract
In this study, the effect of water depth on vertical motion responses and added resistance of ships in waves was numerically examined. The applied numerical method corresponded to the time domain B-spline three-dimensional Rankine panel method. The effect of water depth was considered by placing panels on the floor and applying the bottom boundary condition. The added resistance at a finite water depth was analyzed via a pressure integration method that integrated the second-order pressure on a body surface. The experimental and numerical results for a restrained vertical cylinder were compared under a zero-speed condition. Under a forward-speed condition, a similar comparison was performed for a blunt-modified Wigley model at an infinite water depth. When the water depth decreased, the motion response and added resistance tended to decrease. Finally, to identify the water depth effect on an actual ship, the presented method was applied to a lifelike ship, namely, the KVLCC2 tanker, under full and ballast loading conditions.
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Acknowledgments
The study was supported by the Lloyd's Register Foundation (LRF)–Funded Research Center at Seoul National University and also the Ministry of Trade, Industry and Energy, Korea, under the Industrial Technology Innovation Program, No. 10062881, and the Naval International Cooperative Opportunities (NICOP) project, Grant N62909-15-1-2020. The authors sincerely appreciate their assistance. The authors also thank Research Institute of Marine Systems Engineering (RIMSE) and Institute of Engineering Research (IOER) at Seoul National University for administrative support.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 145 • Issue 6 • November 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Jul 31, 2018
Accepted: Feb 19, 2019
Published online: Sep 12, 2019
Published in print: Nov 1, 2019
Discussion open until: Feb 12, 2020
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