文章摘要
康钟绪,赵娜,刘强,宋瑞祥,张慧娟,郭建军.中隔板对片式阻性消声器的影响分析[J].声学技术,2019,38(4):428~432
中隔板对片式阻性消声器的影响分析
Analysis of the influence of middle baffle on dissipative silencer with acoustical splitters
投稿时间:2018-08-16  修订日期:2018-09-24
DOI:10.16300/j.cnki.1000-3630.2019.04.012
中文关键词: 片式阻性消声器  中隔板  多层吸声结构  吸声系数
英文关键词: dissipative silencer with acoustical splitter  middle baffle  multi-layer absorption plates  absorption coefficient
基金项目:
作者单位E-mail
康钟绪 北京市劳动保护科学研究所, 北京 100054 zhongxukang@163.com 
赵娜 北京市劳动保护科学研究所, 北京 100054  
刘强 北京市劳动保护科学研究所, 北京 100054  
宋瑞祥 北京市劳动保护科学研究所, 北京 100054  
张慧娟 北京市劳动保护科学研究所, 北京 100054  
郭建军 北京市劳动保护科学研究所, 北京 100054  
摘要点击次数: 55
全文下载次数: 60
中文摘要:
      片式阻性消声器的消声能力决定于消声片的吸声系数,消声片内的中隔板对吸声系数影响的详细分析对消声器的设计和应用具有重要意义。应用传递矩阵法并结合声波在吸声材料中的传播理论,建立了片式阻性消声器内多层消声片的吸声系数计算模型,计算了消声器内不同消声通道的吸声系数,通过对比分析不同消声通道的吸声系数,讨论了中隔板对片式阻性消声器消声能力的影响。以实际消声器为例,通过计算吸声系数和实际的插入损失测试,对比两种结果,显示两者在随频率变化的趋势上吻合良好,验证了消声片内设置中隔板对消声器消声效果在不同频段具有不同的影响,在低频和较高频率范围内,中隔板具有积极作用,而对于中频段,中隔板具有消极作用。
英文摘要:
      The sound attenuation performance of dissipative silencer with acoustical splitters depends on the sound absorption coefficient of the absorption sheet. The detailed analysis of the influence of the middle baffle in acoustical splitters on the absorption coefficient is of great significance to the design and application of the silencer. Based on the transfer matrix method and the sound wave propagation theory in sound-absorbing materials, a calculation model of absorption coefficient of the multi-layer absorption plates in silencer is established. The sound absorption coefficients of different absorbing channels in silencer are calculated. By comparing and analyzing the sound absorption coefficients of different absorbing channels, the influence of the middle baffle on the sound absorption performance of the dissipative silencer is discussed. Taking the actual silencer as an example, the comparison between calculated sound absorption coefficient and the measured insertion loss shows a good agreement with each other in the trend of frequency change. It is verified that the effect of the middle baffle in acoustical splitter on attenuation performance is different in different frequency ranges. In the low frequency and higher frequency range, the baffle plate plays a positive role, but in the middle frequency range, the baffle plate plays a negative role.
查看全文   查看/发表评论  下载PDF阅读器
关闭
function PdfOpen(url){ var win="toolbar=no,location=no,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes"; window.open(url,"",win); } function openWin(url,w,h){ var win="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=" + w + ",height=" + h; controlWindow=window.open(url,"",win); } &et=6FD48CA0A0DD47593B531C92A19AC7AFB45134B1E88BDB3BB58677A133D35CB19E33BCB66E2DE8FA24EB9C348F51F6C381DB96FA399351F63D58F1EF0FF4B3280C09AB211975B114B0C7AD127F3DA62B5F04C9F1F2EB328DED5D2FA670B0A376&pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=DDCFCD5ACE1B1E5A6D46213553C850CA&yid=B6351343F4791CA3&aid=&vid=&iid=E158A972A605785F&sid=B7ACE2F11789CAE0&eid=4BEA9A781F286FC6&fileno=20190412&flag=1&is_more=0">