Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
FREQUENCY-BASED DAMAGE DETECTION IN BEAMS USING AN ADDITIONAL ROVING MASS
Submission Author:
Juliana Cardoso Santos , DF
Co-Authors:
Juliana Cardoso Santos, Marcus Vinicius Girão de Morais
Presenter: Juliana Cardoso Santos
doi://10.26678/ABCM.COBEM2019.COB2019-1103
Abstract
This paper applied the frequency-based damage detection using an additional mass to detect damage in free-free and simply supported beams by Timoshenko theory. This technique based on frequency-shift consists of the application of an additional mass along the length of the damaged structure. The natural frequency is monitored as an addictive mass is placed along the structure. The magnitude of the additional mass applied is 2% of the total mass of the beam. The natural frequencies are obtained using FEM and experimental tests. Damage identification and location are investigated using Discrete Wavelet Transform (DWT). In the preliminary results, the frequency-shifts response of damage structure using additional mass are a promising alternative to damage identification and location.
Keywords
Timoshenko beam, Damage Detection, free vibration, additional mass, non-destructive technique.
