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Studies in the Area of Wind Turbines Reported from Tongji University (Wind Turbine Tower Failure Modes Under Seismic and Wind Loads)

Source: 
Energy Daily News

2019 SEP 17 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- Research findings on Energy - Wind Turbines are discussed in a new report. According to news originating from Shanghai, People’s Republic of China, by NewsRx correspondents, research stated, “This paper studies the structural responses and failure modes of a 1.5-MW horizontal-axis wind turbine under strong ground motions and wind loading. Ground motions were selected and scaled to match the two design response spectra given by the seismic code, and wind loads were generated considering tropical cyclone scenarios.”

Financial supporters for this research include National Natural Science Foundation of China, International Collaboration Program of Science and Technology Commission of the Ministry of Science and Technology, China, International Collaboration Program of Science and Technology Commission of Shanghai Municipality, Sichuan Province, 111 Project, Fundamental Research Funds for Central Universities of China.

Our news journalists obtained a quote from the research from Tongji University, “Nonlinear dynamic time-history analyses were conducted and structural performances under wind loads as well as short-and long-period ground motions compared. The results show that under strong wind loads the collapse of the wind turbine tower is driven by the formation of a plastic hinge at the lower section of the tower. This area is also critical when the tower is subject to most ground motions. However, some short-period earthquakes trigger the collapse of the middle and upper parts of the tower due to the increased contribution of high-order vibration modes. Although long-period ground motions tend to result in greater structural responses, short-period earthquakes may cause brittle failure modes in which the full plastic hinge develops quickly in regions of the tower with only a moderate energy dissipation capacity.”

According to the news editors, the research concluded: “Based on these results, recommendations for future turbine designs are proposed.”

For more information on this research see: Wind Turbine Tower Failure Modes Under Seismic and Wind Loads. Journal of Performance of Constructed Facilities, 2019;33(2):. Journal of Performance of Constructed Facilities can be contacted at: Asce-Amer Soc Civil Engineers, 1801 Alexander Bell Dr, Reston, VA 20191-4400, USA. (American Society of Civil Engineers - www.asce.org; Journal of Performance of Constructed Facilities - http://ascelibrary.org/cfo)

The news correspondents report that additional information may be obtained from K.S. Dai, TongJi University, State Key Laboratory, Shanghai 200092, People’s Republic of China. Additional authors for this research include Z. Zhao, A. Camara, G. Bitsuamlak and C. Sheng.

The direct object identifier (DOI) for that additional information is: https://doi.org/10.1061/%28ASCE%29CF.1943-5509.0001279. This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.

 

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