...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of the Acoustical Society of America >Absorption of sound by porous layers with embedded periodic arrays of resonant inclusions
【24h】

Absorption of sound by porous layers with embedded periodic arrays of resonant inclusions

机译：具有共振夹杂物的嵌入式周期性阵列的多孔层对声音的吸收

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The aim of this work is to design a layer of porous material with a high value of the absorption coefficient in a wide range of frequencies. It is shown that low frequency performance can be significantly improved by embedding periodically arranged resonant inclusions (slotted cylinders) into the porous matrix. The dissipation of the acoustic energy in a porous material due to viscous and thermal losses inside the pores is enhanced by the low frequency resonances of the inclusions and energy trapping between the inclusion and the rigid backing. A parametric study is performed in order to determine the influence of the geometry and the arrangement of the inclusions embedded in a porous layer on the absorption coefficient. The experiments confirm that low frequency absorption coefficient of a composite material is significantly higher than that of the porous layer without the inclusions.
机译：这项工作的目的是设计一个在宽频率范围内具有高吸收系数值的多孔材料层。结果表明，通过将周期性排列的共振夹杂物（开槽圆柱体）嵌入多孔基体中，可以显着改善低频性能。夹杂物的低频共振以及夹杂物和刚性背衬之间的能量陷获，可增强由于孔隙内部的粘性和热损失而导致的多孔材料中声能的耗散。为了确定几何形状以及嵌入在多孔层中的夹杂物的排列对吸收系数的影响，进行了参数研究。实验证实，复合材料的低频吸收系数明显高于没有夹杂物的多孔层的低频吸收系数。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号