Effects of a porous jacket on sound radiated from a pipe
作者:
S. Kanapathipillai,
K. P. Byrne,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1996)
卷期:
Volume 100,
issue 2
页码: 882-888
ISSN:0001-4966
年代: 1996
DOI:10.1121/1.416248
出版商: Acoustical Society of America
关键词: PIPES;EFFICIENCY;POROUS MATERIALS;ATTENUATION;ENERGY LOSSES;NOISE POLLUTION CONTROL;AUXILIARY SYSTEMS
数据来源: AIP
摘要:
Conventional pipe laggings incorporate a porous jacket and an impervious outer cladding sheet. It has been observed during investigations of such pipe laggings that a simple porous jacket applied by itself to a pipe can actually increase the sound radiated. Reasons for this phenomenon are discussed. The effect of a rigid frame porous jacket around a pipe is examined theoretically for the breathing, bending, and ovalling modes of pipe vibration. The predicted insertion loss associated with the bending mode of pipe vibration is compared with the corresponding experimental result and some of the results of a parametric study are given.
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