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论文类型：期刊论文

发表时间：2010-08-01

发表刊物：OCEAN ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：37

期号：11-12

页面范围：978-988

ISSN号：0029-8018

关键字：Subdivision arrangement; Offshore ballast water exchange; Sequential method; Multi-objective optimization; Nondominated sorting; Constraint domination; Longitudinal strength; Intact stability

摘要：Ship's subdivision arrangement is a multi-objective combinatorial optimization problem with multiple nonlinear constraints. This study focuses on finding a methodology for ship's subdivision arrangement that can guarantee ship's offshore sequential ballast water exchanging (SBWE) performances in the preliminary design stage. A mathematical model is built using minimizing trims and hull girder longitudinal bending moments and shearing forces occurred in the SBWE as the objectives, and the multiple safety criteria of the SBWE as the constraints. The longitudinal lengths of the ballast water tanks (BWTs) are taken as design variables that will alter within a reasonable length range. An elitist nondominated sorting genetic algorithm (NSGA-II) is utilized to perform the optimization, in which the nondominated sorting mechanism is employed to handle the multiple objectives, and the constraint-domination principle is utilized to handle the multiple constraints. A special crossover operator called the dispersion apportioned allelic (DAA) crossover is introduced to perform the reproduction of the special problem. A real case study of the subdivision arrangement based on the SBWE of a 50,0000WT double hull product tanker is conducted to demonstrate the feasibility and effectiveness of the proposed approach. (C) 2010 Elsevier Ltd. All rights reserved.