Simulação de um edifício esbelto com neutralizador dinâmico de vibrações

Abstract

Mechanical vibration is a physical phenomenon studied by Mechanical Engineering and can be dangerous for many mechanical systems. Thus, attemps are made to eliminate or reduces their effectcs on the structures. Dynamic Vibration Neutralizers are tools widely applied in the control these oscillations, when caused by wind loads in slender buildings, have large amplitudes and low frequency. This work aims to develop a reduced-scale virtual model, which simulates a slender four-storey building, which is mathematically modeled, which allows verifying its modal forms of vibrations. From this, it is possible to design a Dynamic Vibration Neutralizer of the inverted pendulum type using the Theory of Fixed Points to obtain the optimal parameters for the project, which aims to control the vibrations suffered by the building. The theoretical mathematical model is compared with two similar models in CAD/CAE in order to validate these virtual models, the results obtained show a satisfactory correlation between them. It is then possible to obtain the Frequency Response curves for the primary and global systems, which are compared together with the response amplitudes in the frequency range for which the neutralizer was designed in order to prove its effectiveness. This study showed correlations with percentage errors in the range of 3\% with efficacy greater than 99\% in reducing vibration amplitudes on the fourth floor of the building. There are improvements that can be applied to the study that are presented as recommendations for future work.