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Stability assessment for intact ships in the light of model experiments

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Abstract:

A systematic method for assessing intact ship stability with a free-running model in a seakeeping and maneuvering basin is proposed in this paper. Model experiments were carried out in extremely steep regular waves for a model drifting, running in head seas, and quartering seas. This method was applied to two purse seiners, and efficiently identified thresholds in metacentric heights for capsizing of these ships. These capsizing thresholds are compared with requirements of the IMO Code on Intact Stability. This series of model experiments also confirms that capsizing at the threshold occurs only in quartering seas, and shows that capsizing is caused by broaching, loss of stability on a wave crest, or bow diving.

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Authors and Affiliations

  1. Department of Naval Architecture and Ocean Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan, , , , , , JP

    Naoya Umeda & Masami Hamamoto

  2. National Research Institute of Fisheries Engineering, Ibaraki, Japan, , , , , , JP

    Akihiko Matsuda & Shiro Suzuki

Authors
  1. Naoya Umeda
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  2. Akihiko Matsuda
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  3. Masami Hamamoto
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  4. Shiro Suzuki
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Additional information

Received for publication on Jan. 20, 1999; accepted on July 6, 1999

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Umeda, N., Matsuda, A., Hamamoto, M. et al. Stability assessment for intact ships in the light of model experiments. J Mar Sci Technol 4, 45–57 (1999). https://doi.org/10.1007/s007730050006

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  • DOI: https://doi.org/10.1007/s007730050006

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