## G. Dealing with Periodic Materials: CDISP, CELEPO, HOMOGN

When dealing with modal analysis of periodic materials, someuseful information may be extracted from raw data: dispersion curves can bededuced from the different wave numbers and associated frequencies by carefulordering (CDISP program); the phase speed and meanpolarization of each wave number and associated frequencies can be calculated (CELEPO program); from the low-frequency limit of longitudinaland transversal waves, a set of equivalent orthotropic material constants canbe extracted (HOMOGN program).