| Project/Area Number |
09450098
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Dynamics/Control
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KANEKO Shigehiko SCHOOL OF ENGINEERING, THE UNIVERSITY OF TOKYO, ASSOCLATE PROFESSOR, 大学院・工学系研究科, 助教授 (70143378)
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| Co-Investigator(Kenkyū-buntansha) |
HIROTA Kazuo TAKASAGO R&D CENTER, MITSUBISHI HEAVY INDUSTRIES, RESEARCHER, 高砂研究所, 研究員
WATANABE Tatsuo SCHOOL OF ENGINEERING, THE UNIVERSITY OF TOKYO, ASSISTANT, 大学院・工学系研究科, 助手 (70011179)
MOHRI Yasuhiro SCHOOL OF ENGINEERING, THE UNIVERSITY OF TOKYO, ASSISTANT, 大学院・工学系研究科, 助手 (30010870)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥14,100,000 (Direct Cost: ¥14,100,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1997: ¥9,900,000 (Direct Cost: ¥9,900,000)
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| Keywords | FAST BREEDER REACTOR / SLOSHING / SELF-EXCITED VIBRATION / FLUID ELASTIC VIBRATION / SHELL VIBRATION / INSTABILITY / COUPLED PROBLEM / COOLING SYSTEM / 時間遅れ系 / 炉壁 / 安全性 |
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| Research Abstract |
In this study, we performed stability analyses of self-excited vibration of multiple flexible cylindrical wires coupled with annular sloshing and succeeded in deriving the theory for modeling the unstable vibration and design methodology for countermeasures. The system to be analyzed is the combination of walls and annular passage for coolant used for cooling Fast Breeder Reactor. Based on the theory we already derived. We developed a theory applicable to the case composed of dual flexible cylindrical shells. The validity of this theory was verified by experiments. In the experiments, we observed unstable vibrations in the ease of dual flexible cylindrical shells vibrating out of phase each other for the first time. We performed calculation for the instability and obtained so-called instability map which directly leads to design criteria for countermeasures to avoid the instability.
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