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To ensure that wind turbine towers remain economically viable, they must be able to operate for prolonged periods. Therefore, analyzing the dynamic behavior of the structure is crucial to extend its lifespan and optimize its efficiency. In this study, we investigate the attenuation of vibrations in a wind turbine tower using metamaterials. For this analysis, a discrete model of the tower is considered. The finite element method (FEM) is employed in the numerical simulation using a routine developed in Python. The wind effect is described by force signals obtained through a statistical method, using Weibull Probability Distribution as random distribution and Kaimal’s power spectral density to simulate the speed wind fluctuations caused by turbulence. The action of the wind is represented by a concentrated force at the upper end of the tower, specifically concentrated at the nacelle. To reduce the tower vibration, identical metamaterials are placed in different positions along the tower and the performance is evaluated considering attenuation of the first and the fifth modes.

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Use of Metamaterials to Reduce Vibration of a Wind Tower Subjected to Arbitrary Stochastic Wind

  • 章节

  • 发表日期：

    2025年

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  • Vinícius Gabriel Peixoto Borges,
  • Nícolas da Silva Dias,
  • Adriano Todorovic Fabro,
  • Aline Souza de Paula

摘要

To ensure that wind turbine towers remain economically viable, they must be able to operate for prolonged periods. Therefore, analyzing the dynamic behavior of the structure is crucial to extend its lifespan and optimize its efficiency. In this study, we investigate the attenuation of vibrations in a wind turbine tower using metamaterials. For this analysis, a discrete model of the tower is considered. The finite element method (FEM) is employed in the numerical simulation using a routine developed in Python. The wind effect is described by force signals obtained through a statistical method, using Weibull Probability Distribution as random distribution and Kaimal’s power spectral density to simulate the speed wind fluctuations caused by turbulence. The action of the wind is represented by a concentrated force at the upper end of the tower, specifically concentrated at the nacelle. To reduce the tower vibration, identical metamaterials are placed in different positions along the tower and the performance is evaluated considering attenuation of the first and the fifth modes.