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Título : Non linear down-frequency conversion effects in high intensity Vibration of plate transducers and piezoelectric structures
Autor : Alippi, Adriano; Bettucci, Andrea; Biagioni, Angelo; Gallego Juárez, Juan Antonio; Passeri, Daniele; Riera, Enrique
Palabras clave : Ultrasound plate transducers
Nonlinear acoustics
Fecha de publicación : dic-2007
Editor: Sociedad Española de Acústica
Citación : XIX Congreso Internacional de Acústica (ICA2007)
Serie : ICA2007
NLA-05-001-IP
Resumen: Driving airborne ultrasound plate transducers at high intensity levels is an important point in many industrial applications, that meets with unavoidable limits due to nonlinear modal interactions. Subharmonic and fractional-harmonic frequency pairs generation, internal modulation and chaotic behaviour are all effects that greatly compromise the transducers efficiency and their use. In the present paper, similarities are put in evidence between a complex plate transducer used for ultrasound generation in air and a simple piezoelectric structure. The latter case, however, could be experimented through a very wide input power range, such that a drop over of the above mentioned effects is set in evidence above a given power level. This suggests that a similar behaviour could be met in the former case, that would greatly advantage the use of such kind of transducers.
Descripción : Ponencia presentada en el XIX Congreso Internacional de Acústica (ICA2007), Madrid, 2-7 Sep 2007.-- PACS: 43.55.Cs.
URI : http://hdl.handle.net/10261/5304
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