Vibration mitigation in offshore wind turbines via tuned mass damper
Vibration mitigation in offshore wind turbines via tuned mass damper
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DOI：
10.1016/j.engstruct.2018.12.092
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发表时间：
2019-03
影响因子：
5.5
通讯作者：
Mina Ghassempour;G. Failla;F. Arena
中科院分区：
文献类型：
--
作者：
Mina Ghassempour;G. Failla;F. Arena
本文讨论了通过底部固定水平轴海上风力涡轮机中的调谐质量阻尼器减轻振动。该研究重点关注安装在单桩上的基线 5 兆瓦涡轮机，在机舱内配备全向调谐质量阻尼器，探索了在运行和停转转子条件下的各种潜在调谐频率、质量和阻尼比。研究发现，实现结构振动最佳减少的调谐频率应根据运行条件下的风速而改变，而相反，仅在停放条件下通常等于第一支撑结构模式的固有频率。由于转子动力学固有的非线性，该结果表明基于支撑结构模式的固有频率的调谐质量阻尼器的传统设计可能不适合海上风力涡轮机。
This paper deals with vibration mitigation via tuned mass damper in bottom-fixed, horizontal-axis offshore wind turbines. Focusing on a baseline 5-MW turbine mounted on a monopile, equipped with an omnidirectional tuned mass damper inside the nacelle, the study explores a wide range of potential tuning frequencies, mass and damping ratios, in both operational and parked rotor conditions. It is found that the tuning frequency to attain optimal reduction of structural vibrations shall be changed depending on the wind velocity in operational conditions while, in contrast, is generally equal to the natural frequency of the first support structure modes only in parked conditions. This result, attributable to inherent non-linearity of rotor dynamics, demonstrates that a conventional design of the tuned mass damper based on the natural frequencies of the support structure modes may not be suitable for offshore wind turbines.