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A importância da utilização de sistemas de controle de vibração em geradores eólicos e a busca pela correta implementação destes dispositivos de controle, têm sido alvo de crescentes pesquisas nos últimos tempos devido o aumento da utilização desta tecnologia para produção de energia elétrica. Neste contexto, o presente trabalho procurou introduzir conceitos pertinentes ao dimensionamento de um amortecedor passivo, conhecido como TMD (Tuned Mass-Damper), e aplicá-los para o caso de uma torre eólica presente no Campus do IPB. Para tanto foi necessário realizar análise dinâmica da estrutura através de elementos finitos, a partir do software ANSYS, de forma a obter suas frequências naturais e modos de vibrar. Estas informações são fundamentais ao cálculo dos parâmetros ótimos do TMD, onde foi proposto que este seja utilizado para atenuar a vibração da torre em sua primeira frequência natural. Foram então realizadas simulações através do software MATLAB com o intuito de observar a resposta da estrutura após a introdução do TMD. As respostas obtidas mostraram redução significativa da vibração da torre, especialmente para maiores valores de massa do TMD. Além disso, observou-se que para casos onde não se utiliza devidamente os parâmetros ótimos do TMD, a atenuação da vibração ocorre de maneira menos satisfatória. Através de tais resultados foi possível demonstrar a coerência dos cálculos realizados e das simulações feitas, apresentando este trabalho, portanto, importantes contribuições à futura construção do TMD.
The importance of using vibration control system in wind generators and the search for the correct implementation of these control devices, have been the subject of increasing research in recent times due to the increased use of this technology for the production of electrical energy. In this context, the present work sought to introduce concepts pertinent to the design of a passive damper, known as TDM (Tuned Mass-Damper), and to apply them to the case of a wind tower present on the IPB Campus. Therefore, it was necessary to perform a dynamic analysis for this structure through finite elements method, using the ANSYS software, in order to obtain its natural frequencies and vibration modes. This information is essential to the calculation of the optimal TMD’s parameters, where it was proposed that it be used to attenuate the vibration of the tower in its first natural frequency. After that, some simulations were performed using MATLAB software in order to observe the structure response after the introduction of the TMD. The responses obtained showed a significant reduction of tower vibration, especially when greater mass values were used. In addition, it was observed that for cases where the optimal TMD’s parameters are not used properly, the vibration attenuation occurs in a less satisfactory way. Through these results, it was possible to demonstrate the coherence of the calculations performed and the simulations made, presenting this work, therefore, important contributions to the future construction of the TMD.
The importance of using vibration control system in wind generators and the search for the correct implementation of these control devices, have been the subject of increasing research in recent times due to the increased use of this technology for the production of electrical energy. In this context, the present work sought to introduce concepts pertinent to the design of a passive damper, known as TDM (Tuned Mass-Damper), and to apply them to the case of a wind tower present on the IPB Campus. Therefore, it was necessary to perform a dynamic analysis for this structure through finite elements method, using the ANSYS software, in order to obtain its natural frequencies and vibration modes. This information is essential to the calculation of the optimal TMD’s parameters, where it was proposed that it be used to attenuate the vibration of the tower in its first natural frequency. After that, some simulations were performed using MATLAB software in order to observe the structure response after the introduction of the TMD. The responses obtained showed a significant reduction of tower vibration, especially when greater mass values were used. In addition, it was observed that for cases where the optimal TMD’s parameters are not used properly, the vibration attenuation occurs in a less satisfactory way. Through these results, it was possible to demonstrate the coherence of the calculations performed and the simulations made, presenting this work, therefore, important contributions to the future construction of the TMD.
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Torre eólica Gerador eólico Análise dinâmica TMD Controle de vibração Amortecimento