| Project/Area Number |
23760207
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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(系)研究科(研究院), 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) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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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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| Research Abstract |
This research investigated the vibrations of wind turbines for electrical power generation and suppression of the vibrations. The wind turbine is modeled as a coupled system of a tower and blades. Wind turbines on the ground are subjected to wind pressure which varies with the height from the ground, while the offshore wind turbines are subjected to the wind pressure and wave. The numerical results showed the occurrence of the nonlinear vibrations of the wind turbines. Some kinds of dynamic absorbers such as tuned mass dampers, pendulums and tuned liquid dampers are installed to suppress the vibrations of the wind turbines on the ground. Gyroscopes is attached to the floating bases of the offshore wind turbines to suppress the vibration cased by the wave. The influences of values of absorber's and gyroscope's parameters on their performance are also examined.
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