EXPERIMENTAL OBSERVATION OF NONLINEAR VIBRATIONS USING A CLOSED-LOOP VIBRATION SYSTEM
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Data
2015-12-01
Autores
Barros, Everaldo de
Souto, Carlos d'Andrade
Mathias, Mauro Hugo [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Polish Acad Sciences
Resumo
This paper presents experimental observation of nonlinear vibrations in the response of a flexible cantilever beam to transverse harmonic base excitations around its flexural mode frequencies. In the experimental setup, instead of manual control of the signal excitation frequency and amplitude, a closed-loop vibration system is used to keep the excitation amplitude constant during the frequency sweep and to increase confidence in the experimental results. The experimental results show the presence of the third mode in the response when varying the excitation frequency around the fourth mode. The frequency-response curves, response spectrum and Poincare plots were used for characterization of nonlinear dynamic behaviour of the beam.
Descrição
Palavras-chave
nonlinear vibrations, closed-loop vibration system, nonlinear structural dynamics, cantilever beam
Como citar
Metrology And Measurement Systems. Warszawa: Polish Acad Sciences, v. 22, n. 4, p. 559-564, 2015.