Passive Vibration Suppression of Beams by Piezoelectric Elements

摘要

A general design method for vibration suppression of beam by piezoelectric elements was theoretically analyzed based on mode analysis with assumption that piezoelectric element was thin enough and did not change the mode shape of the beam. By this method, the vibration suppression of beam could be designed by an electric circuit, resistor, condenser and coil, shunted to piezoelectric elements. As an example, a calculation for a cantilever beam was carried out and verified by experiment. In a case of resistor shunted circuit, the device coupling coefficient and modal optimal tuning of resistor was discussed. In general, a high vibration suppression was given by a large device coupling coefficient, which was a function of a material coupling coefficient and a structure of the piezoelectric element.