Data availability for the work entitled "Topology optimization of metadevices based on macroscopically distinguishable isotropic materials for natural eigen-frequency recovery of lightened structures"

The provided data for replicating the results include: *The set of meshes of the plates, including the full plate, and the plates lightened with both circular and rhomboid holes. These meshes are in GNU octave/Matlab "mat" compatible format. *The set of meshes of the 3D connecting rod, including the mesh of the full rod, and the mesh of the rod lightened with 3 circular holes. These meshes are in Salone_Meca v19 "med" compatible format. Material data and boundary conditions are provided in the manuscript.