風浪による減速量の統計的傾向(日本航海学会第20回講演会)

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タイトル別名
  • Statistical Study of Retarding Effect of Wind and Sea on Ship's Speed
  • 風浪による減速量の統計的傾向
  • フウロウ ニ ヨル ゲンソクリョウ ノ トウケイテキ ケイコウ

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抄録

The author tried to formulate statistically the trends of abatement of ship's speed (ΔV knots) relative to the force of wind (B-Beaufort Scale), by means of the graphical method of least square, using the data formerly reported and also newly collected on the subject from trans-Pacific navigation records of 1957. The results are compared and shown by the following figures. Fig.1. Head wind and sea (ΔV_h, knots) Fig.2. Beam wind and sea (ΔV_b knots) Fig.3. Free wind and sea (ΔV_f knots) (N.B.) Including intentional reduction of speed. Further, the author analysed the above results and noticed that abatement of ship's speed by wind effects (ΔV_w, knots) are proportional to wind velocity (W m/sec) and those by wave (or Sea) effects (ΔV_s knots) to wave height (H m). (Fig.5 and 6)

収録刊行物

  • 日本航海学会誌

    日本航海学会誌 20 (0), 103-109, 1959

    公益社団法人 日本航海学会

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