Acoustic stop bands in almost-periodic and weakly randomized stratified media: perturbation analysis

作者：Guenneau S^*; Movchan A B; Movchan N V; Trebicki J

来源：Acta Mechanica Sinica, 2008, 24(5): 549-556.

DOI：10.1007/s10409-008-0180-z

• Transmission problem
• Small random perturbations
• Stop bands

In this paper, we analyze the effect of both deterministic and random perturbations of a regular multi-layered elastic structure on its stop band properties. The tool of choice is the transfer matrix method, which is both versatile and easy to implement. In both cases, we find that the stop-bands widen. We observe the appearance of very narrow pass-bands within the stop-bands, which can be observed in other instances in optics.

• 出版日期2008-10