The acoustic metamaterials are frequently designed using FEA techniques. This paper presents the detailed method of employing the periodic boundary condition and Floquet periodic boundary condition in the FEA software – ANSYS 2022 R1. The procedure operates on APDL (Ansys Parametric Design Language) code in-serted into analysis in Mechanical Application. An example of plate-type metamaterial with antisymmetric periodicity is used for verification of the procedure.