Dynamic Characteristic Analysis of the Piezoelectric Intelligence Structures

Vibration isolation and control is an important field in modern engineering activities. A particular problem associated with machinery isolation in environments is structural resonance vibration. A new K-shape structure called "intelligent toggle plate", which is used to control vibration, is presented in this paper. The intelligent toggle plate is made of combining the piezoelectric ceramic with the toggle plate. Using the intelligent toggle plate as partial structure, a new intelligent structural experiment model is set up. The experimental research shows that the experiment model can obtain preferable effect on controlling vibration, which has a great significance for piezoelectric intelligence material applied to the active control on structural vibration. Moreover, the mode analysis method and finite element analysis method are applied to discuss the sensitivity of structural dynamic characteristics. At the specified node with different modal frequencies, the 1st order sensitivity of eigenvector versus structural damping and stiffness is calculated. The results show that damping and stiffness have effect on the decrease of vibration displacement respectively, and the magnitudes of their effect are different.