| Original Articles |
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Directional Propagation Characteristics of Flexural Waves in Two-Dimensional Thin-Plate Phononic Crystals |
| WEN Ji-Hong;YU Dian-Long;WANG Gang;ZHAO Hong-Gang;LIU Yao-Zong;WEN Xi-Sen |
| Institute of Mechatronical Engineering, National University of Defense Technology, Changsha 410073 |
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| Cite this article: |
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WEN Ji-Hong, YU Dian-Long, WANG Gang et al 2007 Chin. Phys. Lett. 24 1305-1308 |
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Abstract The propagation characteristics of flexural waves in two-dimensional thin-plate phononic crystals (PCs) are analysed with the plane wave expansion (PWE) method to yield phase constant surfaces, which predict high directivity of flexural wave propagation for certain frequencies outside the band gap. The prediction is validated through the computation of the harmonic responses of a finite structure with 9×9 unit cells. The results indicate that directional propagation of flexural waves is an inherent characteristic of two-dimensional thin-plate PCs while specific effects of the directional propagation in a finite structure vary with the positions of excitations.
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43.40.+s
46.40.Cd
62.30.+d
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Received: 23 November 2006
Published: 23 April 2007
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| PACS: |
43.40.+s
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(Structural acoustics and vibration)
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46.40.Cd
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(Mechanical wave propagation (including diffraction, scattering, and dispersion))
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62.30.+d
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(Mechanical and elastic waves; vibrations)
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