Journal of Ocean Engineering and Science

Volume 1, Issue 3

(4)Evaluation of resistance increase and speed loss of a ship in wind and waves

Shaoze Luo, Ning Ma, Yoshiaki Hirakawa

School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, China b State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, China c Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai, China d Sea & Air Control System Laboratory, Yokohama National University, Yokohama, Japan e Institute of Advanced Sciences, Yokohama, Japan

Received 14 December 2015; received in revised form 7 April 2016; accepted 12 April 2016
Available online 27 April 2016

Abstract
Given the indication of the IMO’s intent to the application of the EEDI and EEOI, the complete and precise total resistance of a ship and induced speed loss in wind and wave is primarily required. This paper proposed a practicable method to evaluate the total resistance in seaway. Besides the still water resistance, the added resistance due to waves is computed using panel method and the wind resistance is obtained using CFD with the verification of an open wind test and statistical formula. The speed loss is acquired in consideration of the matching of the hull, engine and propeller. A hull optimization method is consequently presented based on the proper resistance evaluation approach. The approach is validated available and the total resistance of a ship could be reduced after hull optimization.
© 2016 Shanghai Jiaotong University. Published by Elsevier B.V.
This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ).

Keywords: Speed loss; Resistance increase; Wind; Wave; Hull form optimization.