Modelagem do comportamento estrutural dinâmico de torres de aço para suporte de turbinas eólicas

Abstract

The growing demand for energy in the world and the growing technological advance of the last decades, in line with the need to obtain energy that minimally impacts the environment, have led to a great development of techniques for the use of energy from renewable sources, such as: winds, tides and the sun. In this context (In this scenario), wind energy has been very promising because it is inexhaustible energy, of low environmental impact. Thus, this research aims to study the static and dynamic non-deterministic structural response of a steel tower to be used as a support for a wind turbine model type MM92 from Repower. Throughout the study, different numerical models were developed, using the ANSYS computational program, based on the usual discretization techniques, by means of the Finite Element Method (FEM), with the purpose of verifying how the different numerical modeling interferes on the structural behavior of the steel tower investigated. The analysis of the non-deterministic dynamic response of the structural model is performed for different wind speeds, bearing in mind a critical evaluation about the maximum values obtained for Von Mises's displacements and voltages. Finally, the results obtained during the research work are evaluated and compared with the limit values recommended by international project norms and recommendations.