| Project/Area Number |
18K04035
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
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| Research Institution | Osaka Electro-Communication University |
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Principal Investigator |
ANAMI KEIKO 大阪電気通信大学, 工学部, 教授 (30346077)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 機械力学 / 流体関連振動 / 自励振動 / 連成振動 / 安全対策 / 振動特性 |
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| Outline of Final Research Achievements |
To assure the complete long-term stability and safe operation of the large number of Tainter gates, the model experiment was conducted. Using a large-scaled three-dimensional model, the spring device was designed to ensure dynamic stability. The model test and device design for countermeasure were conducted to the different natural vibration frequency ratio of the skinplate streamwise bending vibration and the whole gate rotational vibration around the trunnion pin. It was confirmed that the proposed leaf spring devices are in useful except when the natural frequency ratio is in the resonance state. At this time, it is possible to sufficiently maintain dynamic stability while retaining the original function of the hoist wire.
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| Academic Significance and Societal Importance of the Research Achievements |
ほとんどのダムで洪水調整用に利用されているテンタゲート式水門は本質的に動的不安定性を持つ可能性があるが、動的に不安定なゲートは構造的な二つの固有振動の振動数比を調節することによって動的に安定にできることがこれまでの学術的な研究で明らかにされている。その結果に基づいて具体的な安全対策法を確立しておくことが、今後起こる可能性のある水門崩壊事故を未然に防ぐために是非必要である。テンタゲートのような大型水門装置の動力学的な特性およびその安全対策に関する研究はきわめて少なく、本研究の成果がテンタゲートの長期的な動的安全性の確保に寄与するところはきわめて大きい。
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