Effects of hull shape and launching conditions on the behaviors of free-fall lifeboats after water entry
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- Arai Makoto
- 横浜国立大学工学部
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- Kamimura Shinichi
- 横浜国立大学大学院
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- Harano Katsuhiro
- 運輸省船舶技術研究所
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- Hashizume Yutaka
- 運輸省船舶技術研究所
Bibliographic Information
- Other Title
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- 自由落下式救命艇の着水後の挙動に対する船型及び落下初期条件の影響
- ジユウ ラッカシキ キュウメイテイ ノ チャクスイ ゴ ノ キョドウ ニ タイスル センケイ オヨビ ラッカ ショキ ジョウケン ノ エイキョウ
- 自由落下式救命艇の着水後の挙動に対する船形及び落下初期条件の影響
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Abstract
In the research and development of free-fall lifeboat systems, emphasis has been mainly on the performance confirmation tests using full-scale prototype boats. On the other hand, fundamental studies that illustrate the behaviors of free-fall lifeboats during water approach and entry have not been sufficiently carried out. The purpose of this paper is to show the effectiveness of a numerical simulation method in evaluating quantitatively the effects of hull shape and launching conditions on the behaviors of free-fall lifeboats. Two lifeboat models having different hull shape, weight distribution, moment of inertia, etc., are utilized in a series of model experiments. Computed results such as boat motion and impact acceleration on the hull are compared with measured ones, and the comparison confirms the validity of our numerical method. The marked effect of guide rail length on boat motion and acceleration are also illustrated. In the case of a boat with an extreme transom stern, it is found that an impulsive force is exerted on the stern during the run of the boat below the water surface. A sharp bow, shown herein, is effective for smooth evacuation motion.
Journal
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- Journal of the Society of Naval Architects of Japan
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Journal of the Society of Naval Architects of Japan 1999 (185), 101-110, 1999
The Japan Society of Naval Architects and Ocean Engineers
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Details 詳細情報について
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- CRID
- 1390282679070627584
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- NII Article ID
- 110003862208
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- NII Book ID
- AN00194094
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- ISSN
- 18842070
- 05148499
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- NDL BIB ID
- 4805910
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- Data Source
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- JaLC
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed