Natural Frequencies and Vibration Modes of an Aeronautical Axial Compressor Blade and Disk

Julia Dantas Gomes, Geraldo Creci

Natural Frequencies; Vibration Modes; Axial Compressor; Aeronautical Gas Turbine; Finite Element Method.

This article presents the natural frequencies and vibration modes of the blade and disk of the first stage of an axial compressor from a 5-kN thrust aeronautical gas turbine. The determination of the natural frequencies and vibration modes of these components enables an assessment of their dynamic behavior relative to the operating range, aiming to avoid resonance. There are no analytical solutions for the natural frequencies and vibration modes of structures with such complex geometries; therefore, calculations are performed using numerical computer simulations with Ansys® finite element software. To ensure the reliability of the results, the software is calibrated using simple beams for which analytical solutions exist. After verifying excellent agreement between the analytical solutions and the numerical computational results provided by Ansys® for simple beams, the same methodology is applied to the blade and disk of the first-stage axial compressor, which feature complex geometries. The results obtained for the blade and disk of the aeronautical axial compressor under study show excellent consistency - given the geometry and material used - and allow for an assessment of the components' dynamic behavior to prevent resonance-related issues.

Received: 13 June 2026, Received in revised form: 15 July 2026, Accepted: 19 July 2026, Available online: 23 July 2026

10.22161/ijaers.137.4