Acoustic Poisson-like effect in periodic structures.
J Acoust Soc Am
; 139(6): 3353, 2016 06.
Article
en En
| MEDLINE
| ID: mdl-27369161
ABSTRACT
Redirection of acoustic energy by 90° is shown to be possible in an otherwise acoustically transparent sonic crystal. An unresponsive "deaf" antisymmetric mode is excited by matching Bragg scattering with a quadrupole scatterer resonance. The dynamic effect causes normal unidirectional wave motion to strongly couple to perpendicular motion, analogous to the quasi-static Poisson effect in solids. The Poisson-like effect is demonstrated using the first flexural resonance in cylindrical shells of elastic solids. Simulations for a finite array of acrylic shells that are impedance and index matched to water show dramatic acoustic energy redirection in an otherwise acoustically transparent medium.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Acoust Soc Am
Año:
2016
Tipo del documento:
Article
País de afiliación:
Estados Unidos