Finite Element Method Dispersion Curves of Sandwich skin

In this paper we aim investigating the Finite Element Method (FEM) and Two Dimensional Fast Fourier Transform (2D-FFT) regarding DISPERSE program to reconstruct dispersion curves of Sandwich Skin. The resolution of the equation based on the finite element method permits to obtain the displacements which are, after that, post processed by the 2D-FFT. To minimize the inaccuracy of the proposed method, parameters must be optimized such as: frequency excitation, model element type, spatial and temporal steps. The investigation is carried out using Abacus CAE. This study allows knowing the optimal parameters to generate dispersion curves depending on the geometry and the materiel of the investigated plate.