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Minimum Weight Design of Built-up T Based on HCSR

HCSR 기반 T형 조립부재의 최소중량설계

  • Shin, Sang-Hoon (Department of Aero Mechanical Engineering, Kyungwoon University) ;
  • Ko, Dae-Eun (Department of Naval Architecture and Ocean Engineering, Dong-Eui University)
  • 신상훈 (경운대학교 항공기계공학과) ;
  • 고대은 (동의대학교 조선해양공학과)
  • Received : 2017.01.31
  • Accepted : 2017.06.09
  • Published : 2017.06.30

Abstract

In a conventional ship structure, stiffeners with an asymmetric section, such as inverted angles, are used widely despite the disadvantage of strength compared to the stiffeners with a symmetric section, such as a built-up T. On the other hand, T-type built-up members are attracting more attention than L-type inverted angles due to the increased size of ships. The purpose of this study was to develop an optimal design program for a built-up T, and apply an evolution strategy as an optimization technique. In the optimization process, the gross thickness concept was adopted for the design variables and objective function, and the constraints are set up based on HCSR (Harmonized Common Structural Rules). Using the developed program in this study, the optimal stiffener design was carried out for 300K VLCC and 158K COT of which the orders were obtained lately. The optimal results revealed the weight reduction effect of 144 tons and 60 tons, respectively.

Keywords

Built-up T;Evolution strategy;HCSR;Minimum weight design;Weight reduction

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