| 祁鹏山,杜军,姜久龙,董亚科,张佳龙.层状双周期结构声子晶体带隙特性研究[J].声学技术,2016,35(4):303~307 |
| 层状双周期结构声子晶体带隙特性研究 |
| Band gap characteristics of the layered phononic crystal with double-cycle structure |
| 投稿时间：2015-10-20 修订日期：2016-01-25 |
| DOI：10.16300/j.cnki.1000-3630.2016.04.004 |
| 中文关键词: 声子晶体 双周期 噪声控制 传递矩阵法 有限元 |
| 英文关键词: phononic crystal double cycle noise control transfer matrix method finite element |
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| 中文摘要: |
| 设计了一种层状五组元双周期结构声子晶体，并将其等效为一维声子晶体，采用传递矩阵法推导出了该结构的能带结构；在该带隙范围内弹性波或声波的传播能够得到有效抑制，实现对噪声的控制。同时，分析了取消内部周期以后第一带隙的变化以及改变硅橡胶层厚度对第一带隙的影响。结果表明，该结构与简单二元结构相比，在降低带隙频率的同时有效减轻了结构质量，且“内部周期”主要影响带隙宽度；当增加硅橡胶层的厚度时，带隙频率进一步降低。 |
| 英文摘要: |
| A layered phononic crystal structure with five elements and double cycle is designed, and it is simplified to a one-dimensional phononic crystal. Then, the band structure is derived by using transfer matrix method. The elastic wave or sound wave propagation can be effectively suppressed within the range of the band gaps and the noise control can be achieved. Meantime, the first bad gap is changed when the internal cycle is cancelled and the effect of rubber layer thickness on the width of first band gap is analyzed. The results show that this structure can get lower band gap frequency and lower structure mass compared with the simple two element structure, and the internal cycle mainly affects the band gap width. With the thickness of rubber layer increases, the band gap frequency is reduced further. |
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