A hydrodynamic optimization design methodology for a ship bulbous bow under multiple operating conditions. Issue 1 (1st January 2016)

• Record Type: Journal Article
• Authors: Lu, Yu; Chang, Xin; Hu, An-kang
• Is Part Of: Engineering applications of computational fluid mechanics. Volume 10:Issue 1(2016)
• Page Start: 331
• Page End: 346
• Publication Date: 2016-01-01
• Subjects: Hydrodynamic optimization -- multiple operating conditions -- bulbous bow -- parametric form approach -- evolutionary algorithms -- Rankine source panel method -- total resistance; Computational fluid dynamics -- Periodicals; 620.10640285
• DOI: 10.1080/19942060.2016.1159987
• Languages: English
• ISSNs: 1994-2060

Abstract

ABSTRACT: The main objective of this article is to describe an innovative methodology for the hydrodynamic optimization of a ship bulbous bow which considers multiple operating conditions. The proposed method is more practical and effective than the traditional optimization process, which is only based on contractually specified design condition. Parametric form approaches are adopted by employing an F-spline curve in order to generate variants of the hull bulbous bow forms using form design parameters modified, resulting in an optimization system based on improved genetic algorithms. The Rankine source panel method is used for the hydrodynamic evaluation, wherein non-linear free surface conditions and the trim and sinkage of the ship are taken into consideration. The validity and effectiveness of the proposed methodology for a large container ship is investigated by comparing the computational results with experimental data, which demonstrates that the proposed methodology can engage well in the automation process and improve hydrodynamic performance during actual ship design practices.