In this work, the radial symmetric vibration modes of thin piezoceramic rings have been analyzed by means of a previously proposed theorfetical model. Both the resonance frequencies and the effective electromechanical coupling factor (keE), as a function of the aspect ratio G between the inner and outer radii of the ring, were computed. The results have shown that the disk structure (G + 0) has only one radial symmetrical mode (with its harmonics), but, for the ring structure (G + l), two different modes are clearly distinguished: the ring mode, which has no harmonics, and a width-like mode, with its harmonics. Moreover, the results show that the ring structure can be assumed to be definitely reached for G > 0.6. An analysis of the material coupling factor in the ring geometry is reported as well.
Analysis of the Radial Symmetrical Modes of Thin Piezoceramic Rings
IULA, Antonio;
1999-01-01
Abstract
In this work, the radial symmetric vibration modes of thin piezoceramic rings have been analyzed by means of a previously proposed theorfetical model. Both the resonance frequencies and the effective electromechanical coupling factor (keE), as a function of the aspect ratio G between the inner and outer radii of the ring, were computed. The results have shown that the disk structure (G + 0) has only one radial symmetrical mode (with its harmonics), but, for the ring structure (G + l), two different modes are clearly distinguished: the ring mode, which has no harmonics, and a width-like mode, with its harmonics. Moreover, the results show that the ring structure can be assumed to be definitely reached for G > 0.6. An analysis of the material coupling factor in the ring geometry is reported as well.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
