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Hull Form Optimization by Modification Function of Bell-shaped Distribution

종모양 분포 변환함수를 이용한 선형최적화 기법에 관한 연구

  • Choi, Hee-Jong (Maritime and Ocean Engineering Research Institute, KOROI) ;
  • Kim, Hee-Jung (Dept. of Naval Arch. & Ocean Eng., Pusan National University) ;
  • Chun, Ho-Hwan (Dept. of Naval Arch. & Ocean Eng., Pusan National University) ;
  • Jung, Kwang-Hyo (Dept. of Naval Arch. & Ocean Eng., Pusan National University)
  • 최희종 (한국해양연구원 해양시스템안전연구소) ;
  • 김희정 (부산대학교 조선해양공학과) ;
  • 전호환 (부산대학교 조선해양공학과) ;
  • 정광효 (부산대학교 조선해양공학과)
  • Published : 2006.10.20

Abstract

A design procedure for a ship with minimum total resistance was developed using a numerical optimization method called SQP(Sequential Quadratic Programming) and a CFD technique based on the Rankine source panel method with the nonlinear free surface boundary conditions. During the whole optimization process the geometry of the hull shape was represented based on the NURBS(Non-uniform rational B-spline) technique and the modification of the hull shape was controlled using the Bell-shaped distribution function to keep the fairness of the hull shape before and after the hull modification. The numerical analysis was carried out using 4000TEU container ship in the towing tank facility installed in the Pusan national university to know the validity of the developed algorithm for this study. As the results of the numerical analysis it proved that the resistance of the optimized hull is conspicuously reduced in comparison with the original hull in a wave-making resistance point of view.

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