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Numerical Study on Change of Added Resistance due to Incident Waves in Finite Water Depth

Authors
Park, Dong-MinKim, Yonghwan
Issue Date
1-11월-2019
Publisher
ASCE-AMER SOC CIVIL ENGINEERS
Keywords
Added resistance; Finite water depth effect; Pressure integration method; Rankine panel method
Citation
JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING, v.145, no.6
Journal Title
JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING
Volume
145
Number
6
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8353
DOI
10.1061/(ASCE)WW.1943-5460.0000526
ISSN
0733-950X
1943-5460
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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친환경해양개발연구본부
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