| Project/Area Number |
07555077
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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 | 展開研究 |
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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 The Univ.of Tokyo, School of Engineering, Associate Prof., 大学院・工学系研究科, 助教授 (70143378)
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| Co-Investigator(Kenkyū-buntansha) |
TERAMURA Akira Obayashi Coorporation, Chief Researcher, 技術研究所, 主席研究員
WATANABE Tatsuo The Univ.of Tokyo, School of Engineering, Assistant, 大学院・工学系研究科, 助手 (70011179)
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥11,300,000 (Direct Cost: ¥11,300,000)
Fiscal Year 1997: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1996: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1995: ¥7,000,000 (Direct Cost: ¥7,000,000)
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| Keywords | Damper / Nonlinear Vibration / Sloshing / Nonlinear Wave / Tuned Liquid Damper / Vibration Suppression / Vibration Control Device / Damping |
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| Research Abstract |
In this research project, to establish the method of calculation for predicting the performance of various types of Tuned Liquid Dampers (TLDs), the following studies with three types of TLDs were conducted.
(1) Deep water type cylindrical damper
Basic theory for describing the performance of this type of TLD is first derived and then the case with a single net inserted in the middle of the cylinder is investigated .Finally, the simulation code is developed based on the proposed theory which was verified by the experimental results. In the experiment, open area ratio of the inserted net, mass ratio between TLD and main structure, initial amplitude, liquid depth ratio were selected as design parameters.
(2) Rectangular damper
Starting from well established theory for rectangular TLD developed by authors, two cases such as the case with multiple nets inserted perpendicular to the bottom wall of a rectangular container and the case with two nets inserted perpendicular to each side wall of a rectangular container were investigated to achieve higher performance of rectangular TLDs. With these two cases, simulation code is developed based on the proposed analytical model, the results of which were compared with experimental results.
(3) Variable damping TLD
To develop a variable damping TLD,basic studies were performed with a rectangular TLD with steady inlet and outlet flow. First, to investigate the resonant characteristics of sloshing in a rectangular container with steady inlet and outlet flow, shaking table tests were performed and corresponding nonlinear analysis based on perturbation method is conducted. Succedingly, the difference of the dissipation energy produced by TLDs with and without steady inlet and outlet flow were investigated which gives us the result that TLD with steady inlet and outlet flow yields wider resonant range.
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