双层结构敷设声学覆盖层的吸声特性研究

张 浩1 刘碧龙2 苏正涛1

振动与冲击 ›› 2015, Vol. 34 ›› Issue (23) : 31-36.

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (23) : 31-36.
论文

双层结构敷设声学覆盖层的吸声特性研究

  • 张 浩1   刘碧龙2   苏正涛1
作者信息 +

On the sound absorption of double-layered structures coated with acoustic absorption layers

  • ZHANG Hao1   LIU Bilong2   SU Zhengtao1
Author information +
文章历史 +

摘要

利用改进的传递矩阵模型研究了双层钢结构敷设声学覆盖层的吸声特性。在分层介质传递矩阵模型的基础上,引入界面面积因素,使模型可以定性计算具有内部空腔的覆盖层吸声性能。计算结果表明:对于中间有水层的双层钢结构,仅在外层钢板敷设覆盖层,水层引起的共振将显著降低其低频吸声性能。若同时在内层钢板敷设覆盖层,则可显著提高其低频吸声性能。外层覆盖层对第一阶吸声峰值内下的频段和高频段吸声影响显著,而对第一阶吸声谷值频率附近的吸声性能影响很小。内层覆盖层则能显著提高第一阶吸声谷值频率附近的吸声系数。

Abstract

Sound absorption of double-layered steel structures coated with acoustic absorption layers is investigated. By introducing interface area factor into wave propagating theory of multiple-layered medium, the effect of acoustic coating is investigated with improved transfer matrix method. Numerical results reveal that the coating on the inner plate could reduce the effect of cavity resonance of the water between two steel structures and improve absorption coefficient significantly at lower frequency range, while the coating on outer plate has little effect on the cavity resonance.
 

关键词

吸声特性 / 双层结构 / 传递矩阵 / 模量

Key words

sound absorption / double-layered structures / transfer matrix / module

引用本文

导出引用
张 浩1 刘碧龙2 苏正涛1. 双层结构敷设声学覆盖层的吸声特性研究[J]. 振动与冲击, 2015, 34(23): 31-36
ZHANG Hao1 LIU Bilong2 SU Zhengtao1. On the sound absorption of double-layered structures coated with acoustic absorption layers[J]. Journal of Vibration and Shock, 2015, 34(23): 31-36

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