風圧影響下における変針操船支援情報に関する研究

書誌事項

タイトル別名
  • A Study on the Supporting Information in Altering Maneuver under Wind Effect
  • フウアツ エイキョウカ ニ オケル ヘンシン ソウセン シエン ジョウホウ ニ カンスル ケンキュウ

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抄録

Recently, the dimension of vessels calling ports of Japan such as container vessels or LNG carriers is tendency of enlargement. The depth and width of waters should be adapted for the dimension of vessels for securing safety. However the areas of fairway and basin aren't cope with the enlargement of the dimension of vessels, because dredging for the waters expansion takes long time and costs a great deal. Therefore, the opportunity to maneuver large vessels, which the wind effect acts on easily, is increasing at narrow waters. Ship-handling environments in ports will become severe gradually for mariners. It is difficult to predict the wind effect acts on the ship motion for even mariners experienced in maneuvering large vessels in ports. To predict precisely the wind effect is one of the causes of difficulty to maneuver large vessels. If the prediction of the wind effect is uncertain, the risk of the accident such as grounding a shoal or collision to a quay may increase, especially when a vessel navigates in low speed because the wind velocity become fast relatively. Therefore, it is important and meaningful to provide mariners useful information that shows the wind effect on maneuvering. In preceding study, the authors had developed the method to provide mariners information as the diagrams that show the wind effect in berth-approaching maneuver. In this paper, to develop the supporting information in every situation of the maneuvering in ports, the authors predicted the ship motion under wind effect using simulation in altering maneuver and extracted key indexes for mariners from the result, and then developed the supporting information diagram from the value of the extracted key indexes in altering maneuver.

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