Multiscale asymptotic method for the piezoelectric eigenvalue problem in periodically perforated domain
A novel multi-scale asymptotic finite element method based on the Second-Order Two-Scale(SOTS)analysis is proposed for the piezoelectric eigenvalue problem in periodically perforated domain.In this method,the eigen-functions and eigenvalues are expressed in power series of periodicity to the second-order terms and then the homogenized modal equations and effective material coefficients are derived.By the ideal of"corrector equation",the first-and second-order correctors are calculated.A program is established and numerical experiments are carried out on the two-dimensional perforated structures.It is shown that the proposed method is effective to identify the piezoelectric eigenvalues of porous structures as well as the origi-nal eigen-functions for both the displacement and the electric potential can be reproduced by adding the correc-tors to the homogenized solutions.