[HTML][HTML] Bow hull-form optimization in waves of a 66,000 DWT bulk carrier

JW Yu, CM Lee, I Lee, JE Choi - … Journal of Naval Architecture and Ocean …, 2017 - Elsevier
JW Yu, CM Lee, I Lee, JE Choi
International Journal of Naval Architecture and Ocean Engineering, 2017Elsevier
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 λ/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 …
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 λ/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 λ/L = 0.5; and the mean added resistance reduces by 9.5% at sea state 5.
Elsevier
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