周期复合板的带隙特性和辐射噪声衰减特性分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (11) : 188-191.

论文

徐青1，张俊杰2

作者信息 +

Research on the band gap and attenuation characteristic of sound radiation for periodic compound plate

XU Qing1, ZHANG Jun-jie2

Author information +

文章历史 +

摘要

对周期复合板的带隙特性和辐射噪声衰减特性进行了研究。运用传递矩阵法建立了周期复合板的运动方程，对于有限周期复合板，将复合板细化为小单元，利用各个单元之间的辐射阻抗，建立了周期复合板的辐射声功率预报模型。数值计算表明，周期复合板辐射噪声存在衰减阻带，在阻带频率范围内的辐射噪声被极大的抑制。研究了复合结构宽度和材料对阻带衰减特性的影响。

Abstract

The band gap and attenuation characteristics of sound radiation for periodic compound plate are investigated. The coupled equations are established by transfer matrix method, and radiation sound is calculated by radiation impedance through meshing the plate into equal squares. Calculations show that there are stop bands for the radiation sound, and the level of sound radiation is greatly suppressed between the frequency ranges of the stop bands. The influence of the material and geometric parameters on band gap is discussed.

导出引用

徐青1，张俊杰2. 周期复合板的带隙特性和辐射噪声衰减特性分析[J]. 振动与冲击, 2017, 36(11): 188-191

XU Qing1, ZHANG Jun-jie2. Research on the band gap and attenuation characteristic of sound radiation for periodic compound plate[J]. Journal of Vibration and Shock, 2017, 36(11): 188-191

参考文献

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