Propagation of elastic wave in symmetrical quasi-periodic phononic crystal composed of solid/liquid

Xiao Xuyang;Chen Runping;Xia Jihong;Xi Feng

Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (15) : 114-118.

PDF(1592 KB)
PDF(1592 KB)
Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (15) : 114-118.
论文

Propagation of elastic wave in symmetrical quasi-periodic phononic crystal composed of solid/liquid

  • Xiao Xuyang1,Chen Runping1,Xia Jihong1,Xi Feng2
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Abstract

On basis of quasi-periodic Fibonacci sequence, the symmetrical quasi-periodic phononic crystal, composed of solid and liquid medium, is proposed. The propagation of elastic wave and the located resonant modes are investigated numerically with transfer matrix method. At the center of phononic band gap, a located resonant mode exists. Then two located resonant modes is exist and they are centered exactly on center resonant mode. But for symmetrical quasi-periodic phononic crystal with high order, there only is one resonant mode in band gap. Moreover, for elastic wave oblique incident, the band gap and resonant modes slowly shift to high frequency region. The resonant modes in band gap can be acted as super narrow bandwidth filter with multiple channels. For elastic wave with large incident angle, the low frequency elastic wave can only propagate through the high order quasi-periodic structure.

Key words

quasi-periodic / Fibonacci sequence / phononic crystal / elastic wave

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Xiao Xuyang;Chen Runping;Xia Jihong;Xi Feng. Propagation of elastic wave in symmetrical quasi-periodic phononic crystal composed of solid/liquid[J]. Journal of Vibration and Shock, 2014, 33(15): 114-118
PDF(1592 KB)

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