CHARACTERIZATION OF MECHANICAL VIBRATION DAMPING BY PIEZOELECTRIC MATERIALS
| Autor: | George P. Simon, H. H. Law, P. L. Rossiter, L.L. Koss |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Damping ratio
Engineering Acoustics and Ultrasonics business.industry Mechanical Engineering Mechanics Dissipation Condensed Matter Physics law.invention Damping capacity Thermoelastic damping Mechanics of Materials Control theory law Electrical network Energy transformation Damping torque business Mechanical energy |
| Zdroj: | Journal of Sound and Vibration. 197:489-513 |
| ISSN: | 0022-460X |
| Popis: | Piezoelectric materials (piezo-materials) convert mechanical energy into electrical energy via the mechanism of piezoelectricity, and this electrical energy may be dissipated through a connected load resistance. The energy dissipation through this mechanism is termed piezo-damping. New models based on this energy conversion and dissipation have been proposed to characterize the damping behaviour of the piezo-materials. An equivalent electrical circuit model is put forward to determine the required load resistance, and a mechanical spring-dashpot model is used to describe the damping capacity of the piezo-materials. Equations were derived to predict optimal resistance load, maximum damping ratio and the shift of the resonance frequency. A two-degree-of-freedom (2-DOF) experimental set up was developed to test the validity of the models. The experimental results agree very well with the theoretical predictions. The piezo-damping mechanism exhibits potentially a high damping capacity. |
| Databáze: | OpenAIRE |
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