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Abstract

In order to obtain the hull form with the excellent resistance performance, the optimal design program of hull lines with the independent intellectual property is developed. An optimal design method is proposed based on the minimum total resistance and on NGA, SGA and NLP. The fore-body is optimized with total resistance as the objective function, (in which total resistance can be expressed as sum of wave resistance and friction resistance), with the parameter of hull form modification function as design variables, with an appropriate displacement as a constraint. At last, the numerical optimization examples for s60 ships are provided, which indicates that the resistance is reduced distinctly and the lines is smoothing. We can conclude that the hull optimization based on the Rankine source method is more reliable.

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