| Project/Area Number |
15K17997
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Dynamics/Control
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| Research Institution | Hiroshima University |
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Principal Investigator |
Harata Yuji 広島大学, 工学研究科, 助教 (00456691)
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| Research Collaborator |
IKEDA TAKASHI 広島大学, 工学研究院, 教授
ISHIDA YUKIO 名古屋大学, 工学研究科, 名誉教授
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 振動学 / 発電用風車 / 動吸振器 / 非線形振動 / 振動抑制 / 制振 / ロータダイナミクス |
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| Outline of Final Research Achievements |
In this research, the vibrations of onshore and offshore wind turbines for electrical power generation and suppression of their vibrations are investigated. The wind turbines are modeled as lower degrees-of-freedom systems, the equations of motion of the systems are derived, and the natural frequencies, response curves and time histories are calculated. Vibration suppression of roller-type vibration absorbers for the horizontal motions of structures and tuned liquid dampers for roll motions of structures are investigated. Unstable regions, where the amplitude of vibration of the system increases with time, are determined analytically and experimentally in two-blade wind turbines and offshore wind turbine blades. It is shown that in onshore wind turbine blades resonant peaks appear at some rotational speeds of the blades and the peaks can be suppressed by using a single pendulum-type vibration absorber theoretically and experimentally.
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