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Small Wind Turbine Tower Vibration a...

Mollasalehi, Ehsan.

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Small Wind Turbine Tower Vibration and Noise Emission.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Small Wind Turbine Tower Vibration and Noise Emission./
作者:	Mollasalehi, Ehsan.
面頁冊數:	100 p.
附註:	Source: Masters Abstracts International, Volume: 52-04.
Contained By:	Masters Abstracts International52-04(E).
標題:	Applied Mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR96936
ISBN:	9780494969366

Small Wind Turbine Tower Vibration and Noise Emission.
Mollasalehi, Ehsan.

Small Wind Turbine Tower Vibration and Noise Emission. - 100 p.

Source: Masters Abstracts International, Volume: 52-04.

Thesis (M.Sc.)--University of Calgary (Canada), 2013.

A major barrier to the acceptance of small wind turbines is that they are perceived to be noisy particularly when mounted on monopole towers rather than traditional guy-wired ones. This research discusses an aspect of noise propagation that has not been studied previously: vibration and noise emission of the tower and consists of three main steps; first, vibration measurements from 24 accelerometers placed on the 10.2 m tower of a Skystream 2.4 kW wind turbine by which natural frequencies and corresponding de ection shapes were calculated. Second, the results from the survey were used to verify the predictions of a finite element model of the tower structure. And lastly, the verified model was placed in the air domains such that the structural vibration generates sound waves. Experiments showed that most of vibration energy is engaged in very low frequency band (≤10Hz). It was found that wind itself can only excite first two bending modes. On the other hand, emitted noise from the tower at large distances can be neglected while close to the tower can reach to 30dB.

ISBN: 9780494969366Subjects--Topical Terms:

1018410
Applied Mechanics.

Small Wind Turbine Tower Vibration and Noise Emission.
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245 1 0 $a Small Wind Turbine Tower Vibration and Noise Emission.
300 $a 100 p.
500 $a Source: Masters Abstracts International, Volume: 52-04.
500 $a Advisers: David Wood; Qiao Sun.
502 $a Thesis (M.Sc.)--University of Calgary (Canada), 2013.
520 $a A major barrier to the acceptance of small wind turbines is that they are perceived to be noisy particularly when mounted on monopole towers rather than traditional guy-wired ones. This research discusses an aspect of noise propagation that has not been studied previously: vibration and noise emission of the tower and consists of three main steps; first, vibration measurements from 24 accelerometers placed on the 10.2 m tower of a Skystream 2.4 kW wind turbine by which natural frequencies and corresponding de ection shapes were calculated. Second, the results from the survey were used to verify the predictions of a finite element model of the tower structure. And lastly, the verified model was placed in the air domains such that the structural vibration generates sound waves. Experiments showed that most of vibration energy is engaged in very low frequency band (≤10Hz). It was found that wind itself can only excite first two bending modes. On the other hand, emitted noise from the tower at large distances can be neglected while close to the tower can reach to 30dB.
590 $a School code: 0026.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Mechanical. $3 783786
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690 $a 0548
710 2 $a University of Calgary (Canada). $b Mechanical and Manufacturing Engineering. $3 2100723
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791 $a M.Sc.
792 $a 2013
793 $a English
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