The Effect of Hull Form Parameters on the Hydrodynamic Performance of a Bulk Carrier

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.

A Back–Forward Approach-Based Efficiency Performance Analysis Model for Hybrid Electric Propulsion Ships Using the Holtrop–Mennen Method

“…As a result, an additional weight of 6000 kg was introduced compared to the original mechanical propulsion system. The results obtained from this method have been validated and shown to have a certain level of reliability through comparison with CFD-based results [33]. This Holtrop-Mennen method for calculating the demanded power ensures fast computations and does not significantly impact the simulation analysis speed.…”

“…As described above, for more accurate wave resistanc prediction, the resistance calculated based on the speed and selected parameters can als be divided into three sections to check the increasing trend. The results obtained from this method have been validated and shown to have a ce tain level of reliability through comparison with CFD-based results [33]. This Holtrop Mennen method for calculating the demanded power ensures fast computations and doe not significantly impact the simulation analysis speed.…”

Estimating hydrodynamic performances of the designed leisure boats: a study considering hull shape and dimension variations

“…Based on numerical analysis, the factor that significantly affects the hydrodynamic performance is the bow shape of the vessel [14]. Combined optimization of main dimension variation and hull shape on bulk carriers using empirical method and towing tank test has effect on ship performance on drag, seakeeping and maneuverability [15]. The new hull surface automatic modification method based on Delaunay triangulation can significantly improve optimization efficiency [16].…”

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“…Many studies that use regression models for preliminary predictions and optimisations during the early design stage are carried out and presented in the literature. Some recent publications that have addressed and used statistical regression models in multi-criteria ship optimisations, parametric predictions of resistance and power, evolutionary algorithm and techniques for automation of hull form design, verifications with CFD and experimental data can be found in references [10,16,17,18,19,20,21]. A recent publication [22] provides helpful considerations on how to estimate Energy Efficiency Operational Indicator (EEOI), as part of Ship Energy Efficiency Management Plan (SEEMP) proposed by the International Maritime Organisation (IMO), based on the Automatic Identification System (AIS) data and application of Holtrop Mennen method.…”