Improved reliability of wind turbine towers with active tuned mass dampers (ATMDs)
Improved reliability of wind turbine towers with active tuned mass dampers (ATMDs)
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DOI：
10.1016/j.jsv.2017.12.026
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发表时间：
2018-04
影响因子：
4.7
通讯作者：
B. Fitzgerald;Saptarshi Sarkar;A. Staino
中科院分区：
文献类型：
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作者：
B. Fitzgerald;Saptarshi Sarkar;A. Staino
现代多兆瓦风力涡轮机由细长、柔性和轻度阻尼的叶片和塔架组成。这些部件对风引起的振动表现出很高的敏感性。近年来，随着塔的尺寸、灵活性和成本的增加，保护这些结构免受湍流气动载荷引起的损坏的需要变得明显。本文结合结构动力学模型和概率评估工具，以证明现代风力涡轮机塔配备主动调谐质量阻尼器（ATMD）时，结构可靠性的改善。本研究提出一种多模态风力涡轮机模型，用于风力涡轮机控制设计与分析。本研究将一个ATMD到这个模型的塔。该模型受到随机产生的风速变化的风荷载，以开发现代多兆瓦风力涡轮机塔架结构不确定性下的风引起的概率需求模型。通过数值仿真验证了主动控制系统对改善涡轮机结构性能和提高可靠性的有效性。该研究构建了脆弱性曲线，说明了由于包含阻尼器，塔架对风荷载的脆弱性降低。结果表明，主动控制器是成功的，在提高塔的响应的可靠性。根据本文进行的分析，已观察到在额定风速下超过给定位移的概率大大降低。
Modern multi-megawatt wind turbines are composed of slender, flexible, and lightly damped blades and towers. These components exhibit high susceptibility to wind-induced vibrations. As the size, flexibility and cost of the towers have increased in recent years, the need to protect these structures against damage induced by turbulent aerodynamic loading has become apparent. This paper combines structural dynamic models and probabilistic assessment tools to demonstrate improvements in structural reliability when modern wind turbine towers are equipped with active tuned mass dampers (ATMDs). This study proposes a multi-modal wind turbine model for wind turbine control design and analysis. This study incorporates an ATMD into the tower of this model. The model is subjected to stochastically generated wind loads of varying speeds to develop wind-induced probabilistic demand models for towers of modern multi-megawatt wind turbines under structural uncertainty. Numerical simulations have been carried out to ascertain the effectiveness of the active control system to improve the structural performance of the wind turbine and its reliability. The study constructs fragility curves, which illustrate reductions in the vulnerability of towers to wind loading owing to the inclusion of the damper. Results show that the active controller is successful in increasing the reliability of the tower responses. According to the analysis carried out in this paper, a strong reduction of the probability of exceeding a given displacement at the rated wind speed has been observed.