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Theoretical and experimental investigations of flexural wave propagation in periodic grid structures designed with the idea of phononic crystals 下载免费PDF全文
The propagation characteristics of flexural waves in periodic grid
structures designed with the idea of phononic crystals are
investigated by combining the Bloch theorem with the finite element
method. This combined analysis yields phase constant surfaces, which
predict the location and the extension of band gaps, as well as the
directions and the regions of wave propagation at assigned
frequencies. The predictions are validated by computation and
experimental analysis of the harmonic responses of a finite
structure with 11× 11 unit cells. The flexural wave is
localized at the point of excitation in band gaps, while the
directional behaviour occurs at particular frequencies in pass
bands. These studies provide guidelines to designing periodic
structures for vibration attenuation. 相似文献
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