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Ship hull optimization based on wave resistance using wavelet method

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Abstract

The ship hull surface optimization based on the wave resistance is an important issue in the ship engineering industry. The wavelet method may provide a convenient tool for the surface hull optimization. As a preliminary study, we use the wavelet method to optimize the hull surface based on the Michel wave resistance for a Wigley model in this paper. Firstly, we express the model’ s surface by the wavelet decomposition expressions and obtain a reconstructed surface and then validate its accuracy. Secondly, we rewrite the Michel wave resistance formula in the wavelet bases, resulting in a simple formula containing only the ship hull surface’ s wavelet coefficients. Thirdly, we take these wavelet coefficients as optimization variables, and analyze the main wave resistance distribution in terms of scales and locations, to reduce the number of optimization variables. Finally, we obtain the optimal hull surface of the Wigley model through genetic algorithms, reducing the wave resistance almost by a half. It is shown that the wavelet method may provide a new approach for the hull optimization.

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Authors and Affiliations

  1. Transportation Equipment and Ocean Engineering College, Dalian Maritime University, Dalian, 116026, China

    Yong Zhao  (赵勇)

  2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Yong Zhao  (赵勇) & Zhi Zong  (宗智)

  3. State Key Laboratory of Structural Analysis for Industrial Equipment School of Naval Architecture, Dalian University of Technology, Dalian, 116024, China

    Li Zou  (邹丽)

Authors
  1. Yong Zhao  (赵勇)
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  2. Zhi Zong  (宗智)
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  3. Li Zou  (邹丽)
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Corresponding author

Correspondence to Zhi Zong  (宗智).

Additional information

Project supported by the Natural National Science Foundation of China (Grant Nos. 51309040, 51379033), the National Key Basic Research Development Program of China (973 Program, Grant No. 2013CB036101) and the Fundamental research fund for the Central Universities (Grant No. DMU3132015089).

Biography: ZHAO Yong (1981-), Male, Ph. D., Lecturer

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Cite this article

Zhao, Y., Zong, Z. & Zou, L. Ship hull optimization based on wave resistance using wavelet method. J Hydrodyn 27, 216–222 (2015). https://doi.org/10.1016/S1001-6058(15)60475-9

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  • DOI: https://doi.org/10.1016/S1001-6058(15)60475-9

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