Avaliação da frequência de vibração das fundações superficiais dos aerogeradores das usinas eólicas da Prainha e da Taíba

Abstract

This paper shows a comparative estimate of the vibration frequency on surface foundation substructure generated by aerogenerators in two wind power plants located in Prainha and Taíba, Brazilian Northeast coast. The paper deals with the fundamental concepts of dynamics of foundations. In the literature topic the most recommended methods to estimate vibration caused by rotating machinery in foundation substructures were presented. As an application, the formerly presented methods were applied as a full-scale case to estimate vibration due to aerogenerators. The resulting values were in large range. Empirical methods had smaller numbers then the elastic semi-space methods, which were higher.