| Project/Area Number |
06302064
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 総合 |
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| Research Field |
船舶工学
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| Research Institution | KYUSHU UNIVERISTY |
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Principal Investigator |
KIJIMA Katsuro Faculty of Engineering, Kyushu University, Professor, 工学部, 教授 (90038042)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Hiroaki Tokyo University of Mercantile Marine, Professor, 商船学部, 教授 (70016963)
IMAZU Hayama Tokyo University of Mercantile Marine, Professor, 商船学部, 教授 (00016958)
FUJINO Masataka Faculty of Engineering, University of Tokyo, Professor, 工学部, 教授 (10010787)
FURUKAWA Yoshitaka Faculty of Engineering, Kyushu University, Associate Professor, 工学部, 助教授 (90253492)
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| Project Period (FY) |
1994 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥10,000,000 (Direct Cost: ¥10,000,000)
Fiscal Year 1996: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1994: ¥5,700,000 (Direct Cost: ¥5,700,000)
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| Keywords | Ship Manoeuvrability / Narrow Waterway / Hydrodynamic force / Cross Flow / Collision Avoidance / Margin of Safe Navigation / 大斜航角 / Cross flow drag / 特異点分布法 / 操縦性能 / 操縦運動推定 |
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| Research Abstract |
It is well known that hydrodynamic interaction forces between ships or between ship and bank wall or pier have much influence on characteristics of ship manoeuvrability. It is important to know the characteristics of these interaction forces to insure safety of sailing ships. Then we developed theoretical prediction method for the hydrodynamic interaction forces based on the slender body theory and carried out numerical simulation of manoeuvring motion of ships sailing in the proximity of pier. According to the results of numerical calculation, there is a danger that the ship will collide with the pier if the lateral ship distance is less than 0.7 L.
We also developed prediction method for cross flow drag acting on a ship hull based on the vortex shedding model because component of cross flow drag dominates the hydrodynamic force acting on ship hull when ship is moving with large drift angle at low speed. It is shown that longitudinal distribution of the cross flow drag along the ship length can be predicted with comparatively comparatively high accuracy using the presented prediction method.
Furthermore we presented collision avoidance system using the predicted hydrodynamic forces and investigated effectiveness of the system by numerical simulation considering human factor.
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