Propagation properties of elastic waves in semi-infinite phononic crystals and related waveguides

Y. W. Yao (), F. G. Wu, Z. L. Hou and Y. Y. Liu

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 58, issue 4, 353-360

Abstract: The transmission and reflection coefficients of two-dimensional semi-infinite solid-solid phononic crystal systems and fluid-fluid phononic waveguide structures have been investigated. The numerical results show that the transmission spectra for longitudinally and transversally polarized incident waves are different, and the spectra of the transmission and reflection coefficients of the semi-infinite system agree well with the band structure. The numerical results show that when a guided wave incident, localized modes are excited, and different polarities have different coupling efficiencies with the incident guided wave. At the same time, far from the cutoff frequency, the guided wave couples out of semi-infinite waveguide highly efficiently. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 43.20.+g General linear acoustics; 43.40.+s Structural acoustics and vibration; 46.40.cd Mechanical wave propagation (including diffraction; scattering; and dispersion) (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00244-x

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