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Publication
Comparative study of vibration measuring techniques applied to aluminum beams localized damage
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Advisor(s)
Abstract(s)
This work analyses the feasibility of using a commercial sound level meter (SLM) to measure
the dynamic properties of a structural element, i.e., vibration frequencies, using acoustic output
data obtained during a rover impact test carried out with rover impact hammer on small beams.
The acoustic measurements are compared with those obtained with the accelerometer during
the impact tests. In this case, four small aluminum beams were tested under undamaged and
damaged conditions. The latter was simulated using drilled holes with different diameters at
the mid span of the aluminum beams. Data from acoustic and acceleration measurements were
processed to obtain the frequency content of each signal. The results allowed demonstrating if
the sound level meter is able to capture the natural frequencies and monitor the damage effects
on the natural frequencies of the beams.
Description
Keywords
Vibrations Natural frequency Sound level meter Acoustic Damage
Pedagogical Context
Citation
Silva, Edson; Braz-César, M.T.; Ribeiro, J.E.; Bratti, Gionanni (2019). Comparative study of vibration measuring techniques applied to aluminum beams localized damage. In 8th International Conference - M2D 2019 - Mechanics and Materials Design. Bologna/Italy. p. 19-26