The file Fig_1b contains the FEM simulated band structure. The value of k vector is a sweep between 0 and 3 corresponding to Gamma-M-K-Gamma points.
The format is clear text, with two data columns, which are separated by a tab.
The two columns are: k, eigenfrequency (Hz)

The file Fig_1d_u_* contains the values of the FEM-simulated displacement for the defect mode, uniform beams of 1.2 mm and 130 um length.
The format is clear text, with two data columns, which are separated by a tab.
The two columns are: x (m), w (a.u.)