P. Langlet et al., HOMOGENIZATION OF PERIODIC MATERIALS USIN G THE FINITE-ELEMENT METHODIN THE LIMIT OF LARGE WAVELENGTHS, Journal de physique. IV, 4(C5), 1994, pp. 921-924
A numerical model has been developed to study the propagation of plane
harmonic waves in single, doubly or triply periodic materials. The ho
mogenized properties of porous materials are determined with the help
of an anisotropic model, in the limit of large wavelengths. A validati
on has been carried out with periodically perforated plates, the reson
ance frequencies of which have been measured.