Enhanced wave and finite element method for wave propagation and forced response prediction in periodic piezoelectric structures |
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Authors: | Fan Yu Manuel Collet Mohamed Ichchou Li Lin Olivier Bareille Zoran Dimitrijevic |
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Institution: | 1. Laboratory of Tribology and Systems Dynamic, école Centrale de Lyon, Ecully 691304, France;School of Energy and Power Engineering, Beihang University, Beijing 100083, China;2. Laboratory of Tribology and Systems Dynamic, école Centrale de Lyon, Ecully 691304, France;3. School of Energy and Power Engineering, Beihang University, Beijing 100083, China;4. PSA Peugeot Citro?n, Paris F-78943, France |
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Abstract: | As a promising numerical tool of structural dynamics in mid-and high frequencies, the wave and finite element method (WFEM) is receiving increasingly attention and applications. In this paper, an enhanced WFEM has been developed with a reduced model and a new eigenvalue scheme. The reduced model is applicable for structures with piezoelectric shunts or local dampers;the new eigenvalue scheme can mitigate the ill-conditioning when the wave basis is calculated. The enhanced WFEM is applied to a thin-wall structure with periodically distributed piezoelectric mate-rials (PZT). Both free wave characteristics and forced response are analyzed and the influences of the suggested enhancements are presented. It is shown that if the control factors are properly cho-sen, these enhancements can improve the accuracy while accelerating the calculation. Resulting from the complexity of the application, these enhancements are not optional but imperative. |
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Keywords: | Eigenvalue scheme Periodic structure Piezoelectric shunt Reduced model Thin-wall structure Wave and finite element method |
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