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中文摘要：
设计了一种由铝和塑料组成的ABBA结构的一维异质双周期镜像声子晶体.用传递矩阵法研究了温度参量的变化对该声子晶体的声波带隙的影响.当温度发生变化时,声子晶体除了发生线膨胀之外,组成声子晶体材料的铝和塑料的杨氏模量也会发生变化,这就导致了声波在介质内的传播速度发生变化.通过观察分析透射谱线,发现在温度变量的影响下,声波带隙能够可控的出现和消失,随着温度的升高,声波带隙会向频率减小的方向移动.特别是在一定温度条件下出现带隙的反转,由带隙变为通带.结果表明,温度对声子晶体带隙有着明显的影响.这个特性可为新型声学器件的设计提供理论参考.
英文摘要：
A structure of ABBA composed of aluminum and plastic one dimensional mirror image Dual-periodical Photonic Crystal Hererogeneous was designed. The change of the temperature parameters are studied by transfer matrix method for the influence of the band gap of phononic crystal. When the temperature changes, the phonon crystal not only happened linear expansion, the young＇s modulus of the aluminium and plastic which composed the phononic crystal is change, also. The transmission line shows that under the influence of the temperature, the band gaps can be controlled appearance and disappearance, and with the increase of temperature, the band gap will move towards the direction of the frequency increases. Especially under the condition of a certain temperature in the reversal of the band gap,which changed from pass band to band gap. The results show that temperature has a significant effect on the phonon crystal band gap. This feature can provide theoretical reference for design of new acoustic device.
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