Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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A Study for the Minimum Weight Design of a Coastal Fishing Boat

소형 연안 어선의 최소 중량 설계에 관한 연구

  • Song, Ha-Cheol (Dept. of Naval Architecture and Marine Eng. Mokpo National Univ.) ;
  • Kim, Yong-Sub (Dept. of Naval Architecture and Ocean Eng. Hongik Univ.) ;
  • Shim, Chun-Sik (Dept. of Naval Architecture and Marine Eng. Mokpo National Univ.)
  • 송하철 (목포대학교 기계선박해양공학부) ;
  • 김용섭 (홍익대학교 조선해양공학과) ;
  • 심천식 (목포대학교 기계선박해양공학부)
  • Published : 2008.04.30
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Abstract

As most of small fishing boats made of FRP have been constructed by experience in Korea, some structural safety problems have been occurred occasionally. To improve the structural strength and reduce the costs for construction and operation, optimum design for small fishing boat was carried out in this study. The weight of fishing boat and the main dimensions of structural members are chosen as objective function and design variables, respectively. By the combination of global and local search methods, a hybrid optimization algorithm was developed to escape the local minima and reduce CPU time in analysis procedure, and finite element analysis was performed to determine the constraint parameters at each iteration step in optimization loop. Optimization results were compared with the real existing fishing boat, and the effects of optimum design were examined from points of view; structural strength, material cost, etc.

한국에서 건조되는 대부분의 소형 연안 어선의 경우 경험에 기초하여 건조되어지기 때문에 구조적 안전성 문제가 발생하곤 했다. 본 논문에서는 이들 어선의 구조강도를 증가시키고 생산 및 운용비를 줄이기 위하여 최적설계를 수행하였다. 어선의 무게와 구조부재의 주요치수들을 각각 목적함수와 설계변수로 선택하였다. 해석과정 중에 극소점을 피하고 CPU 시간을 줄이고자 전역 탐색법과 지역 탐색법을 결합한 하이브리드 최적화 알고리즘이 개발되었다. 또한 최적화 루프의 각 iteration 단계에서 제한조건을 결정하기 위하여 유한요소해석을 수행하였다. 최적화 결과는 초기 어선 모델과 비교하였으며 최적설계의 효과가 구조강도, 재료비 관점에서 검토되었다.

Keywords

References

  1. 수산청(1995), "표준어선형 연구개발 (III) FRP 연안어선 5종 개념 및 기본설계", 한국어선협회 최종보고서, pp 21-32.
  2. 해양수산부(2001), "강화플라스틱(FRP)선의 선체구조기준", pp 9-10.
  3. Das, I. and Dennis, J.E. (1997), "A Closer Look at Drawbacks of Minimizing Weighted Sums of Objectives for Pareto Set Generation in Multi-criteria Optimization Problems", Structural Optimization, International Society for structural and Multidisciplinary Optimization, Vol 14, No 1, pp 63-69.
  4. Jang, C.D. and Na, S.S. (1996), "Minimum Weight Design of the Transverse Frames of Oil Tankers by Generalized Slope Deflection Method", Journal of the Society of Naval Architects of Korea, Vol 33, No 3, pp 103-111.
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  6. Lee, H.S. (1988), "Development of Computer Program for Controlling Structural Weight and Construction Cost", Technical Report, Korea Institute of Machinery and Materials, pp. 12-23.

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  1. Structural design optimization of racing motor boat based on nonlinear finite element analysis vol.2, pp.4, 2010, https://doi.org/10.2478/IJNAOE-2013-0039