Análise numérica e computacional de sistemas de controle de vibrações estruturais induzidas pela ação do vento

Abstract

The construction of buildings, especially the most slender, requires a detailed analysis of the structural dynamic behavior. Such structures are subject to movements induced by wind and other forces, which can cause undesirable effects such as discomfort for the user or even cause a structural collapse. In this scenario, control systems are used to mitigate excessive vibration. Among these systems, those using dynamic responses of the structures to determine control forces, in general, when properly constructed, have satisfactory performance as control systems with feedback. In this work, a numerical analysis of a structural model subject to dynamic wind forces has been proposed, where the excitation forces are obtained by bidimensional computa-tional fluid dynamics (CFD) analysis with LES turbulence model with implicit sub-grid model. The vibrations are controled by a active system (Optimal Control), and semi-active system (magnetorheological).