Table of Contents
Smart Materials Research
Volume 2012 (2012), Article ID 431790, 5 pages
http://dx.doi.org/10.1155/2012/431790
Research Article

Damping Analyses of Structural Vibrations and Shunted Piezoelectric Transducers

Mechanical Engineering Department, Razi University, 6714967346 Kermanshah, Iran

Received 17 November 2011; Accepted 7 December 2011

Academic Editor: Tao Li

Copyright © 2012 Saber Mohammadi and Akram Khodayari. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Piezoelectric transducers in conjunction with appropriate electric networks can be used as a mechanical energy dissipation device. Alternatively, undesired mechanical energy of a structure could be converted into electrical energy that can be dissipated through a shunt network in the form of Joule heating. This paper presents an experimental method to calculate damping energy in mechanical systems. However, the mathematical description of damping mechanism is much more complicated, and any process responsible for the occurrence of damping is very intricate. Structural and piezoelectric damping are calculated and analysed in the case of pulse switching or SSDI semiactive vibration control technique. This technique which was developed in the field of piezoelectric damping consists in triggering the inverting switch on each extremum of the piezoelectric voltage which induces an increase of the electromechanical energy conversion.