A multi-scale asymptotic analysis method for the elastic quadratic eigenvalue problems in periodically composite structure
A multiscale asymptotic analysis method based on the Second-Order Two-Scales(SOTS)ap-proach is proposed for the elastic quadratic eigenvalue problems in periodic composite structure.In this method,the typical quadratic eigenvalue problems with velocity damping effect are considered and the second order asymptotic expansions of eigenvalues and eigen-functions are given by the SOTS approach.Then the fi-nite element procedures are established and the error of eigenvalues are performed.Effectiveness of the method is demonstrated by both the qualitative and quantitative comparisons between the computed SOTS ap-proximations and the reference solutions.It is indicated that the second-order correctors are of importance to reconstruct the detailed information of the original eigenfunctions within the micro cells.