| Project/Area Number |
62302036
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
船舶抵抗・運動性能・計画
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| Research Institution | Osaka University |
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Principal Investigator |
HAMAMOTO Masami Osaka Univ. Engineering Prof., 工学部, 教授 (30107130)
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| Co-Investigator(Kenkyū-buntansha) |
HONDA Keinosuke Koube Univ. of Mercantile Marine Prof., 商船学部, 教授 (00031427)
KIZIMA Katuro Kyusyu Unib. Engineering Prof., 工学部, 教授 (90038042)
KARASUMA Keiichi Hokkaido Univ. Prof., 水産学部, 教授 (80031467)
TATANO Hisayoshi Osaka Univ. Engineering Asis. Prof., 工学部, 助手 (00029042)
HASEGAWA Kazuhiko Osaka Univ. Engineering Asos. Prof., 工学部, 助教授 (60106804)
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| Project Period (FY) |
1987 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥17,700,000 (Direct Cost: ¥17,700,000)
Fiscal Year 1989: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 1988: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1987: ¥9,600,000 (Direct Cost: ¥9,600,000)
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| Keywords | Safety / Capsize / Following waves / Stability / 追波 |
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| Research Abstract |
An analytical and experimental study of ship motions and capsizing in following seas has been conducted. For a ship having six degrees of freedom, the equations of motion are revealed based on Froude-Krylov hypothesis and slender body theory. Experiments have been carried out using a radio-controlled model in following waves generated in the towing tank. Comparisons of the experimentally observed motions and a theoretical prediction are presented. A time domain numerical simulation program for motions and capsizing has been used to investigate motions in sinusoidal waves. The results show good agreement with observed capsizing phenomena.
In the interest of brevity, practical equations for ship motion and capsizing in following seas are derived. Simulations of capsizing are carried out by using Tasai's and Inoue's practical formulas for the hydrodynamic coefficients. Finally a material to discuss safety against capsizing is presented for novelty.
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