Dynamics modelling of beams with shunted piezoelectric elements

General modelling of a resonant shunting damper has been made from piezoelectric sensor/actuator equations. It is found that an additional damping, which is augmented to a system, is generated by the shunt damping effect. The transfer function of the tuned electrical absorber is derived for both series and parallel shunt circuit. The governing equations and associated boundary conditions are derived using Hamilton's principle. The shunt voltage equation is also derived from the charge generated in PZT due to beam vibration. The frequency response function of the obtained mathematical model is compared with that of the tuned electrical absorber and experimental work. The vibration amplitude is reduced about 15 dB at targeted second mode frequency. (C) 2003 Elsevier Science Ltd. All rights reserved.