We present the use of piezoelectric disk buzzers, usual in stringed musical instruments to acquire sound as a voltage signal, for experimental modal analysis. These transducers helped in extracting natural frequencies and mode shapes of an aluminium beam and a steel arch in the laboratory. The results are compared with theoretical predictions and experimental values obtained by accelerometers and a laser displacement transducer. High accuracy, small dimensions, low weight, easy usage, and low cost, make piezoelectric pickups an attractive tool for the experimental modal analysis of engineering structures.
Experimental modal analysis of straight and curved slender beams by piezoelectric transducers / Piana, Gianfranco; Lofrano, Egidio; Carpinteri, Alberto; Paolone, Achille; Ruta, Giuseppe. - In: MECCANICA. - ISSN 0025-6455. - STAMPA. - 51:11(2016), pp. 2797-2811. [10.1007/s11012-016-0487-y]
|Titolo:||Experimental modal analysis of straight and curved slender beams by piezoelectric transducers|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1007/s11012-016-0487-y|
|Appare nelle tipologie:||1.1 Articolo in rivista|