| Project/Area Number |
26289344
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Naval and maritime engineering
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| Research Institution | National Institute of Maritime, Port and Aviation Technology |
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Principal Investigator |
FUJIWARA Toshifumi 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (10425754)
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| Co-Investigator(Kenkyū-buntansha) |
齊藤 昌勝 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (80359124)
二村 正 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (00425753)
下里 耕平 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (70726091)
松井 亨介 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (00627606)
佐藤 宏 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (70435775)
石田 圭 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (60636827)
渡邊 充史 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (20713788)
梅田 隼 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (30757563)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Keywords | VIM / 渦励起動揺 / セミサブ浮体 / 模型試験 / レイノルズ数影響 / VIMシミュレーション / VIM振幅推定 / ISO / セミサブ / VIM推定 / 海洋工学 / 海洋資源 / 潮流 / 波浪中VIM |
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| Outline of Final Research Achievements |
Semi-submersible offshore structures are expected to be used in the Japanese coastal area for promoting resource exploitation and development. As the moored offshore structures are suffered from current, Vortex-induced Motion (VIM) effect should be assessed in an appropriate manner since the VIM causes fatigue damage of the structure’s mooring lines. VIM phenomenon on semi-submersible structures, however, is not clear, and its comprehension is insufficient. Then this research treated the VIM measurement test using large, small, and many forms of semi-submersible structure models to investigate the effect of column-column interval and lower hull volume for VIM amplitude, and shows the trends of VIM amplitude depending on current velocity and lower hull volume ratio for the first time. Moreover, using these results on the VIM amplitude for the models, the estimation method of VIM on a cylindrical and a semi-submersible offshore structure was newly proposed.
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