新型多共振腔声子晶体声屏障的带隙机理及其隔声性能研究

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摘要为控制道路噪声水平，设计了一种新型多共振腔的声子晶体声屏障。该设计先采用理论和仿真计算分析多腔声子晶体的能带结构，研究不同共振腔数量和晶胞形状对声子晶体禁带特性的影响情况，发现随着共振腔个数的增加，带隙的数量和宽度也在增加；针对同种多腔散射体模型还对不同晶格排列方式进行能带特性分析，阐明不同排列方式对带隙范围的影响。为进一步验证带隙的准确性，利用有限元法和边界元法分别仿真计算六共振腔声子晶体声屏障的传递损失，得到的传递损失曲线与其带隙特性能较好的匹配上。最后利用室外实验分别验证其在三角晶格和正方形晶格排列下的隔声效果。实验证明了该新型多共振腔声子晶体声屏障在带隙范围内具有良好的降噪性能。

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	李彬生1
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	戴卓辰1
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	张程1
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	姚凌云1
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关键词 ：局域共振, 声子晶体, 声屏障, 传递损失

Abstract：In order to control the noise level of road, a phononic crystal sound barrier with multiple resonant cavities is designed. The design uses theoretical and simulation calculations to analyze the band structure of multi-cavity phonon crystals, and studies the influence of the number of resonant chambers and the shape of the unit cell on the bandgap characteristics of phonon crystals, and finds that as the number of resonant chambers increased, so did the number and width of band gaps; for the same multi-cavity scatterer model, the energy band characteristics of different lattice arrangements are also analyzed, and the influence of different arrangements on the band gap range is elucidated. In order to further verify the accuracy of bandgap, the insertion loss of the acoustic barrier of the six-resonance cavity phonon crystal were calculated by finite element method and boundary element method, and the insertion loss curve were matched with their bandgap performance. The sound insulation effect under triangular lattice and square lattice is verified by outdoor experiments. Experiments show that the new multi-cavity phononic crystal sound barrier has good noise reduction performance in the band gap range.

Key words： local resonance sonic crystal sound barrier insertion loss

收稿日期: 2022-07-13 出版日期: 2023-08-15

引用本文:

李彬生1,2，戴卓辰1,2，张程1,2，姚凌云1,2. 新型多共振腔声子晶体声屏障的带隙机理及其隔声性能研究[J]. 振动与冲击, 2023, 42(15): 182-189.
LI Binsheng1,2, DAI Zhuochen1,2, ZHANG Cheng1,2, YAO Lingyun1,2. Bandgap mechanism and sound insulation performance of a novel multi-resonant cavity sonic crystal sound barrier. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(15): 182-189.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I15/182

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