International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Bow hull-form optimization in waves of a 66,000 DWT bulk carrier

  • Yu, Jin-Won (Global Core Research Center for Ships and Offshore Plants, Pusan National University) ;
  • Lee, Cheol-Min (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Lee, Inwon (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Choi, Jung-Eun (Global Core Research Center for Ships and Offshore Plants, Pusan National University)
  • Received : 2016.07.19
  • Accepted : 2017.01.26
  • Published : 2017.09.30
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Abstract

This paper uses optimization techniques to obtain bow hull form of a 66,000 DWT bulk carrier in calm water and in waves. Parametric modification functions of SAC and section shape of DLWL are used for hull form variation. Multi-objective functions are applied to minimize the wave-making resistance in calm water and added resistance in regular head wave of ${\lambda}/L=0.5$. WAVIS version 1.3 is used to obtain wave-making resistance. The modified Fujii and Takahashi's formula is applied to obtain the added resistance in short wave. The PSO algorithm is employed for the optimization technique. The resistance and motion characteristics in calm water and regular and irregular head waves of the three hull forms are compared. It has been shown that the optimal brings 13.2% reduction in the wave-making resistance and 13.8% reduction in the added resistance at ${\lambda}/L=0.5$; and the mean added resistance reduces by 9.5% at sea state 5.

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References

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