Adding periodicity in structures leads to wavemode interaction, which generates pass- and stop-bands. Stop-bands are related to the periodic nature of the structure. Thus structural periodicity can be shaped in order to design vibro-acoustic filters to reduce vibration and noise transmission. The aim of this paper is to investigate numerically and experimentally stop-bands in periodic one-dimensional structures. Two methods for predicting stop-bands are described: the first applies to infinite structures using a wave approach; the second deals with the evaluation of a structural transmission loss coefficient. Numerical examples concerning periodic beams are presented. Results are discussed and validated experimentally. Very good agreement between the numerical and experimental models in terms of stop-bands is showed.
Evaluation of stop bands in periodic and semi-periodic structures by experimental and numerical approaches / P. G., Domadiya; Manconi, Elisabetta; Vanali, Marcello; L. V., Andersen; A., Ricci. - ELETTRONICO. - Volume 8:(2014), pp. 171-178. (Intervento presentato al convegno 32nd IMAC Conference and Exposition on Structural Dynamics tenutosi a Orlando, Florida, USA nel Febbraio 2014, 3-6) [10.1007/978-3-319-04774-4_17].
Evaluation of stop bands in periodic and semi-periodic structures by experimental and numerical approaches
MANCONI, Elisabetta;VANALI, Marcello;
2014-01-01
Abstract
Adding periodicity in structures leads to wavemode interaction, which generates pass- and stop-bands. Stop-bands are related to the periodic nature of the structure. Thus structural periodicity can be shaped in order to design vibro-acoustic filters to reduce vibration and noise transmission. The aim of this paper is to investigate numerically and experimentally stop-bands in periodic one-dimensional structures. Two methods for predicting stop-bands are described: the first applies to infinite structures using a wave approach; the second deals with the evaluation of a structural transmission loss coefficient. Numerical examples concerning periodic beams are presented. Results are discussed and validated experimentally. Very good agreement between the numerical and experimental models in terms of stop-bands is showed.| File | Dimensione | Formato | |
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