A methodology to model mechanical losses of piezoelectric devices by the finite element analysis is presented. Complex parts of the material constants are extracted using an iterative method. Mechanical losses of piezoelectric devices are taken into account through these complex constants. A scheme using the QR factorization is developed to decompose mechanical losses of an arbitrary-shaped device into fundamental modes. These losses are then transformed into an equivalent viscous damping ratio in a standard finite element dynamics analysis. The proposed method enables us to obtain a reliable mechanical loss factor. Numerical results demonstrate that the proposed method can predict measured admittance spectra reasonably well.
|出版狀態||Published - 1 十二月 2006|
|事件||10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010 - Bangkok, Thailand|
持續時間: 3 八月 2006 → 5 八月 2006
|Conference||10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010|
|期間||3/08/06 → 5/08/06|