微孔分布范围对穿孔板吸声性能的影响

发布时间：2018-10-19 17:52

【摘要】：根据渗入工艺加工微穿孔板吸声结构产生的微孔不规则分布的特点,研究了微孔不同分布范围的穿孔板的吸声特性。研究发现,随着微孔分布范围的逐渐缩小,穿孔板的共振频率逐渐向低频方向移动。随着穿孔分布范围的变化,微穿孔板的表面法向声阻变化不大,表面法向声抗相对较大。利用穿孔板理论对微孔不同分布范围的穿孔板的吸声特性进行模拟,发现穿孔板理论仅适用于微孔分布范围较大的穿孔板。通过分析穿孔板阻抗的作用,使其在微孔分布范围较小的情况下,也能模拟穿孔板的吸声性能。
[Abstract]:According to the characteristics of irregular distribution of micropores produced by the sound absorption structure of microperforated plates processed by infiltration process, the sound absorption characteristics of perforated plates with different distribution ranges of microholes were studied. It is found that the resonant frequency of the perforated plate moves gradually to the low frequency with the decrease of the distribution range of the micropores. With the change of the distribution range of perforation, the surface normal acoustic resistance of the microperforated plate has little change, but the surface normal acoustic impedance is relatively large. The sound absorption characteristics of perforated plates with different distribution range of microholes are simulated by using perforation plate theory. It is found that perforated plate theory is only suitable for perforated plates with large distribution range of micropores. By analyzing the effect of the impedance of perforated plate, the sound absorption performance of perforated plate can be simulated when the distribution range of micropore is small.
【作者单位】：环境噪声与振动北京市重点实验室北京市劳动保护科学研究所;
【基金】：国家自然科学基金资助项目(11274048,11102093) 北京市自然科学基金资助项目(8142016) 北京市科学技术研究院市级财政基金资助项目(PXM-2016178304-000002) 创新团队基金资助项目(IG201501C1) 西城区优秀人才基金资助项目(20150057) 青年骨干基金资助项目(201502)
【分类号】：TB535

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