物理ベースモデリングに基づくｂｒａｓｈ　ｉｃｅ　ｃｈａｎｎｅｌ　航行船舶の抵抗評価手法の開発

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  • Development of resistance evaluation method of ship navigation in brash ice channels with physically-based modeling
  • ブツリ ベースモデリング ニ モトズク brash ice channel コウコウ センパク ノ テイコウ ヒョウカ シュホウ ノ カイハツ

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Finnish-Swedish ice class rules (FSICR) requests resistance estimation of ship navigation in a brash ice channel with a certain condition. We develop numerical estimation method of the above situation on the basis of physically-based modeling, and apply this method to the model-scale simulations of ship navigation in channels filled with small ice pieces. Real-scale resistances are estimated using the above results with cubic law. Results of the numerical simulation show that our simulator can handle simulation under condition with more than 65000 ice pieces. Estimated resistances are about twice as large as that of FSICR rule formula, but tendencies of differences with two bows are consistent each other. Effects of channel length, the size of ice pieces, fluid force and other parameters are discussed.

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