Projeto de uma mesa com três graus de liberdade para análise de vibrações

Abstract

In this study, it was performed a construction and characterization of a table, which has three degrees of freedom, to study and analyze the vibrations. System response measurements were taken for the determination of related parameters in a vibratory system. In other words, determining of damped natural frequency and damping factor. This second parameter was determined using the logarithmic decrement which uses the logarithmic reduction rate obtained by the ratio between two successive amplitudes of the impulse response, as energy is transferred to other parts of the system, therefore it is dissipated by the presence of damping. Thus, it was determined the damping present in the system. From the natural frequency was determined stiffness parameter. With the determination of the physical parameters of the table, the mathematical model of the system was obtained, allowing for simulations of this model to check their dynamic behavior. Finally, the validation of the mathematical model through comparison was made between the actual response and the simulated response.