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タイトル
  • en Design of a Small Fisheries Research Vessel with Low Level of Underwater-Radiated Noise
作成者
    • en Koyanagi, Yasunari
アクセス権 open access
主題
  • Other en Underwater-radiated noise
  • Other en fisheries research ship
  • Other en propeller cavitation
  • Other en ICES standard
  • NDC 665
内容注記
  • Abstract en It is important for a fisheries research vessel to reduce the underwater-radiated noise. In 1995, the International Council for the Exploration of the Sea (ICES) firstly recommended the maximum noise level for research vessels to ensure the acoustic research works and to prevent the fish reaction against the noise 1). Since then, it has been the world standard for the design of fisheries research vessels. For a small size vessel, however, it is very difficult to achieve the recommendations because of not enough space or capacity to make sound insulations. Moreover, the Froude number (Fn) of such small vessels tends to be higher than that of the larger vessels. Since the higher Froude number of the operating condition causes the large wave-making resistance, both propeller thrust and occurrence of cavitation increase, which tends to result in the higher level of underwater-radiated noise. Meanwhile, the fisheries research-cost can be reduced by using a small vessel, because not only the construction and operation cost, but also maintenance cost become lower than those of a large vessel. It would be desirable and efficient if a small vessel could satisfy the ICES's recommendation in place of a large research vessel. In this paper, the authors propose a design method for a small research vessel to reduce the underwater-radiated noise level. Utilizing this method, a small fisheries research vessel whose capacity is 290 GT and length is 33.5 m has been designed. From the sea trials after the construction, it has been proved successfully that the underwaterradiated noise level is the world lowest class at 10 knots (Fn=0.28) of researching speed and still satisfies the ICES's recommendation even in 11.6 knots (Fn=0.33) of the high-speed region.
出版者 en Marine Acoustics Society of Japan ja 海洋音響学会
日付
    Issued2004-07
言語
  • eng
資源タイプ journal article
出版タイプ AM
資源識別子 HDL http://hdl.handle.net/2115/629
収録誌情報
    • PISSN 09165835
      • en Journal of the Marine Acoustics Society of Japan ja 海洋音響学会誌
      • 巻31 号3 開始ページ11 終了ページ19
ファイル
コンテンツ更新日時 2023-07-26