Investigação da resposta dinâmica de uma torre eólica devido à ação do vento considerando modelos discretos simplificados

Abstract

. A wind turbine tower is a structure built for a long-term operation. In this way, the investigation of the dynamic response gives ways to ensure a better performance and equipment integrity. Therefore, this work proposes a dynamic behavior analysis of the wind tower focused on the frequency domain. Two representative simplified models for the wind tower are considered and a statistical wind analysis to generate force signals is used. Two discrete models based in two different towers were studied, one idealized as 1 DOF and one created by FEM on Ansys software. Force signals were obtained from Weibull distribution and calculated for the tower height using a logarithmic model for the atmospheric boundary layer. Also, Kaimal's power spectral density was used to simulate turbulence. After finding the loads, it was possible to find the frequency response. Values similar to the literature were found for the first tower and were established conditions in which the 1 DOF can be used and situations in which the discrete model is necessary.