2019 Fiscal Year Final Research Report
Low frequency ground vibration originatede from largescale windturbine
| Project/Area Number |
17K07025
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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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| Research Field |
Energy engineering
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| Research Institution | Iwate University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | 大型風車 / 振動 / 空振 / アノイアンス |
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| Outline of Final Research Achievements |
Investigated the mode of propagation of ground vibration that occurs with the operation of large wind turbines. The first attempt was to clarify the change of vibration with distance from the frequency analysis of vibration by FFT, and obtain the hypothesis that the soil quality where the wind turbine is located might be the cause.Next, measurements in an area where wind turbine pollution was progressing, and tried to explain the experience of local residents from a descriptive perspective．As a series of research results, the suggestion that the annoyance problem of the wind turbines should be analyzed from the ground vibration in addition to the air vibration.
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| Free Research Field |
流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
これまで考慮されてこなかった，大型風車に起因する地盤振動が，昨今顕在化してきた風車周辺住民への健康被害の要因の一つではないかという事実を指摘している．
例えば，冬季は地盤が締まり，振動の減衰が少なく，夏・晴天時のアノイアンスが少ないことの説明，また，水田においてアノイアンスが十分に小さくなることに関しては，水と地盤の特性速度の差を表す音響インピーダンスの値が含水率とともに非線形に変化することによるのではないかということが示された．
このことは，今後の風車アノイアンス低減の一つの要素に関しての特性把握の基礎的知識となる．
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