Model losses of piezoelectric devices using finite element and complex material constants

Nien-Ti Tsou, Chang Wei Huang, Chuin Shan Chen, Jay Shieh

Research output: Contribution to conferencePaperpeer-review

Abstract

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.

Original languageEnglish
Pages125-130
Number of pages6
StatePublished - 1 Dec 2006
Event10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010 - Bangkok, Thailand
Duration: 3 Aug 20065 Aug 2006

Conference

Conference10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
CountryThailand
CityBangkok
Period3/08/065/08/06

Keywords

  • Complex Constant
  • Finite Element
  • Mechanical Loss
  • Piezoelectric

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