Abstract
In this study, the effect of joint optimization of the principal dimensions and hull form on the hydrodynamic performance of a bulk carrier was studied. In the first part of the joint optimization process, fast principal-dimension optimization of the origin parent ship considering the integrated performance of ship resistance, seakeeping, and maneuverability, as well as their relationships with the principal dimensions were analyzed in detail based on the ship resistance, seakeeping qualities, and maneuverability empirical methods of Holtrop and Mennen, Bales, and K and T indices, respectively. A new parent ship was chosen from 496 sets of hulls after comprehensive consideration. In the remaining part, a further hull form optimization was performed on the new parent ship according to the minimum wave-making resistance. The obtained results demonstrate that: (a) For the case in which the principal dimension of the original parent-type ship is different from that of the owner’s target ship, within the bounds of the relevant constraints from the owner, an excellent parent ship can be obtained by principal-dimension optimization; (b) the joint optimization method considering the principal dimension and hull form optimization can further explore the optimization space and provide a better hull.
Highlights
To reduce maritime greenhouse gas (GHG) emissions to reach the International Maritime Organization (IMO) 2050 target, new energy-efficient ships are urgently needed
Cerka et al [8] presented a numerical simulation of hull form optimization of a multi-purpose catamaran-type research vessel based on the method of successive approximations
Numerical results obtained in this study have shown that the present hull surface modification technique can produce smooth hull forms with reduced drag effectively and efficiently in the Computational Fluid Dynamics (CFD)-based hull form optimization
Summary
To reduce maritime greenhouse gas (GHG) emissions to reach the International Maritime Organization (IMO) 2050 target, new energy-efficient ships are urgently needed. In addition to resistance optimization, Ouahsine et al [25,26] proposed a numerical method based on c the combination of a mathematical model of nonlinear transient ship maneuvering motion in the horizontal plane and mathematical programming techniques; this method was validated by the turning circle and zigzag maneuvers based on experimental data of sea trials of the 190,000 dwt oil tanker. Few scholars have conducted relevant research on the joint optimization of principal dimensions and hull form of ships considering the integrated performance of ship resistance, seakeeping, and maneuverability. Few scholars have conducted relevant research on the joint optimizat3ioonf 1o6f principal dimensions and hull form of ships considering the integrated performance of ship resistance, seakeeping, and maneuverability. This yielded a total of 24,921 offset points to ensure that the hull geometric information was accurately captured
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