We have measured the lifetime of extended and localized modes electrically excited in periodic and selfsimilar composite piezoelectric plates. Using two different experimental methods, electrical measurement of the vibrational frequency spectrum and heterodyne optical probing of surface vibration in the time domain, evidence was found that the localized modes have on average a longer lifetime than the extended modes.
Lifetime of localized and extended modes in complex composite structures / A., Petri; Alippi, Adriano; Bettucci, Andrea; F., Craciun; F., Farrelly; Wright, O. B.. - (1994), pp. 765-768. (Intervento presentato al convegno 1994 IEEE Ultrasonic Symposium tenutosi a Cannes, Francia) [10.1109/ULTSYM.1994.401756].
Lifetime of localized and extended modes in complex composite structures
ALIPPI, Adriano;BETTUCCI, Andrea;
1994
Abstract
We have measured the lifetime of extended and localized modes electrically excited in periodic and selfsimilar composite piezoelectric plates. Using two different experimental methods, electrical measurement of the vibrational frequency spectrum and heterodyne optical probing of surface vibration in the time domain, evidence was found that the localized modes have on average a longer lifetime than the extended modes.| File | Dimensione | Formato | |
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Alippi_lifetime_1994.pdf
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