Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Use of metamaterials to reduce vibration of a wind tower subjected to an arbitrary stochastic wind
Submission Author:
Vinícius Gabriel Peixoto Borges , DF , Brazil
Co-Authors:
Vinícius Gabriel Peixoto Borges, Nícolas da Silva Dias, Aline Souza de Paula, Adriano Todorovic Fabro
Presenter: Vinícius Gabriel Peixoto Borges
doi://10.26678/ABCM.COBEM2023.COB2023-2360
Abstract
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 their lifespan and optimize their 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. We employ finite element method in the numerical simulation using a routine developed in Python. Wind effect is described by force signals obtained through a statistical method, using Weibull Density Distribution as random distribution and Kaimal's power spectral density to simulate the speed wind fluctuations caused by turbulence. Three different cases of wind force application are considered, the first is the application of only one point force acting on the free end of the tower, the second consists of the same force uniformly distributed throughout the tower and the third is a logarithmic distribution model that represents wind development within the atmospheric boundary layer. To reduce the tower vibration, identical ressonat metamaterials and rainbow metamaterials are considered.
Keywords
wind turbine, vibration reduction, Metamaterials, stochastic wind
