An alternative method to the identification of the modal damping factor based on the dissipated energy.

Montalvão, D. and Silva, J.M.M., 2014. An alternative method to the identification of the modal damping factor based on the dissipated energy. Mechanical Systems and Signal Processing, 54-55, 108 - 123.

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2013 MontalvaoSilva A contribution to modal identification DM JM Rev.pdf - Accepted Version
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DOI: 10.1016/j.ymssp.2014.08.025

Abstract

The identification of the modal parameters from frequency response functions is a subject that is not new. However, the starting point often comes from the equations that govern the dynamic motion. In this paper, a novel approach is shown, resulting from an analysis that starts on the dissipated energy per cycle of vibration. Numerical and experimental examples were used in order to assess the effectiveness of the proposed method. It was shown that, for lightly damped systems with conveniently spaced modes, it produced quite accurate results when compared to those obtained from the method of the inverse. The technique also proved to be simple enough to be used for quick estimates of the modal damping factors. Finally, this paper is a contribution to modal analysis and identification methods, as the developed technique has never been proposed before.

Item Type:Article
ISSN:0888-3270
Uncontrolled Keywords:Experimental modal analysis (EMA); Modal identification; Method of the inverse; Dissipated energy
Subjects:UNSPECIFIED
Group:Faculty of Science & Technology
ID Code:24568
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:30 Aug 2016 12:35
Last Modified:19 Sep 2016 08:21

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