Browse > Article

Optimum Structural Design of Tankers Using Multi-objective Optimization Technique  

신상훈 (현대중공업 산업기술연구소)
장창두 (서울대학교 조선해양공학과)
송하철 (서울대학교 조선해양공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.15, no.4, 2002 , pp. 591-598 More about this Journal
Abstract
In the ship structural design, the material cost of hull weight and the overall cost of construction processes should be minimized considering safety and reliability. In the past, minimum weight design has been mainly focused on reducing material cost and increasing dead weight reflect the interests of a ship's owner. But, in the past experience, the minimum weight design has been inevitably lead to increasing the construction cost. Therefore, it is necessary that the designer of ship structure should consider both structural weight and construction cost. In this point of view, multi-objective optimization technique is proposed to design the ship structure in this study. According to the proposed algorithm, the results of optimization were compared to the structural design of actual VLCC(Very Large Crude Oil Carrier). Objective functions were weight cost and construction cost of VLCC, and ES(Evolution Strategies), one of the stochastic search methods, was used as an optimization solver. For the scantlings of members and the estimations of objectives, classification rule was adopted for the longitudinal members, and the direct calculation method, GSDM(Generalized Slope Deflection Method), lot the transverse members. To choose the most economical design point among the results of Pareto optimal set, RFR(Required Freight Rate) was evaluated for each Pareto point, and compared to actual ship.
Keywords
ES(Evolution Strategies); multi-objective optimization technique; stochastic search method; ES(Evolution Strategies); GSDM(Generalized Slope Deflection Method); Pareto set; RFR(Required Freight Rate);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 김기화, 'Genetic Algorithm에 의한 다목적함수 최적구조설계,'박사학위논문, 서울대학교, 1994
2 Borghi C. A., Fabbri M., Barba P. Di and Sabini A., 'Loney's solenoid multiobjective optimization problem,' IEEE Transactions on Magnetics, 1999
3 Schwefel, H. P., 'Evolutionsstrategie und numerische Optimierung,' Dissertation, Tech- nische Universitaet Berline, 1975
4 한상훈, 최홍식, 조홍동, '다단계 다목적함수 최적화를 이용한 구조물의 최적설계,' 한국전산구조공학회논문집, 제7권, 제1호, 1994
5 Lee, D. K. and Kim, S. Y., 'Techno-Economic Optimization of an LNG Carrier with Multicriteria in the Preliminary Design Stage,' Journal of Ship Production, Vol. 12, No. 3, 1996
6 장창두, 나승수, '일반화된 경사처짐법에 의한 유조선의 횡강도 부재의 최소중량설계,'대한조선학회지, 제33권, 제3호, 1996
7 Knowles, J. D., 'The Pareto Archived Evolution Strategy: A New Baseline Algorithm for Pareto Multiobjective Optimization,'IEEE, 1999
8 Chang Doo Jang and Sang Hoon Shin, 'A Study on the Optimum Structural Design for oil Tankers Using Multi-Objective Optimization', 한국전산구조공학회 학술발표회 논문집, 1998, pp.245-253
9 유원선, 양영순, 'Genetic Algorithms과 Evolu- tionary Strategy의 상호 비교,' 한국전산구조공학회논문집, 제7권 제3호, 1994
10 Jang, C. D., Jung, J. J. and Shin, C. H., 'Minimum Weight Design of Midship Section of Double Hull Oil Tanker by Hybrid Evolution Strategies,'Proceedings of Asian Technical Exchange and Advisory Meeting on Marine Structures, 1997