書誌事項
- タイトル別名
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- Buoyancy-control Type Ballast-free Ship and its Basic Performance
- フリョク セイギョ ホウシキ バラスト フリーセン ノ コンセプト ト ソノ キホン セイノウ ニ ツイテ
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This paper describes the concept of the buoyancy-control type ballast-free ship proposed by Yokohama National University and the result of various studies carried out to examine its performance. In this study, we carried out model experiments in a water circulating channel to measure the ability of the system to exchange seawater in the buoyancy control tanks. We also confirmed by numerical analysis that the increase of the ship resistance by the appendage, i.e., intake and exit vents, is less than 1 percent of the total ship resistance. One of the aims of this concept is to alter existing ships to ballast-free ones by leaving the structures of the existing ships almost as they are, i.e., ballast tanks of conventional ships are to be used as buoyancy control tanks necessary for the proposed system with slight modifications. In order to realize retrofitting of conventional ships to ballast-free ships easily, we propose a simple method by inserting intake and exit units into the space between longitudinal stiffeners on the ship bottom.Furthermore, structural analysis by using a finite element method was performed and we confirmed that no serious problem occurs by the buoyancy control operation. The proposed ballast-free ship concept is a favorable option to solve the ship's ballast water problem.
収録刊行物
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- 日本船舶海洋工学会論文集
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日本船舶海洋工学会論文集 13 257-266, 2011
公益社団法人 日本船舶海洋工学会
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詳細情報 詳細情報について
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- CRID
- 1390282680231883520
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- NII論文ID
- 10029345824
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- NII書誌ID
- AA12057769
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- ISSN
- 18811760
- 18803717
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- NDL書誌ID
- 11203585
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- KAKEN
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