With the development of megawatts wind turbines, excessive vibrations of the flexible and slender wind turbine tower under wind excitation have become increasingly prominent. To enhance implement ability of the passive control device for the tower, a new type of passive pre-stressed tuned mass damper (PS-TMD) is proposed in this study. A simplified mechanical calculation model of the tower with the PS-TMD device is established, and the dynamic coefficient and vibration reduction mechanism are deduced through theoretical analysis. And then the design procedure including the optimal pre-stress and damping coefficient for the proposed device is presented. The numerical simulation example shows that the tuning effect of PS-TMD is better than the traditional tuned mass damper under the same conditions. The results from a shaking table test demonstrate that acceleration and dynamic displacement response are reduced about 20% and 30%, respectively.

中文翻译：

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风力机塔筒预应力调谐质量阻尼器的研究与优化

随着兆瓦级风力发电机组的发展，柔性细长的风力发电机塔架在风力激发下的过度振动问题日益突出。为提高塔架被动控制装置的实施能力，本研究提出了一种新型被动预应力调谐质量阻尼器（PS-TMD）。建立了带有PS-TMD装置的塔架的简化力学计算模型，并通过理论分析推导出了动力系数和减振机理。然后给出了该装置的设计程序，包括最佳预应力和阻尼系数。数值模拟实例表明，在相同条件下，PS-TMD的调谐效果优于传统调谐质量阻尼器。