NDLI: On the low frequency acoustic properties of novel multifunctional honeycomb sandwich panels with micro-perforated faceplates

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On the low frequency acoustic properties of novel multifunctional honeycomb sandwich panels with micro-perforated faceplates

Content Provider	Semantic Scholar
Author	Meng, Haiyu Galland, M. C. Ichchou, Mohamed Xin, Fengxian Lu, Tian
Copyright Year	2019
Abstract	Abstract This paper explores further possibilities of structurally-efficient honeycomb sandwich panels by replacing one of the faceplates with the perforated faceplate from the viewpoint of sound absorption coefficient (SAC) as well as sound transmission loss (STL). An analytical model is presented to calculate both the STL and SAC, with the displacements of the two faceplates assumed identical at frequencies below the faceplate resonance frequency. Influences of core configuration are investigated by comparing different honeycomb core designs. Finite element (FE) models are subsequently developed to validate the proposed analytical model, with agreement achieved. Subsequently, parametric surveys, including the influences of perforation ratio, pore size and core configuration on STL and SAC, are conducted based on the analytical model. Unlike classical honeycomb sandwich panels which are poor sound absorbers, honeycomb sandwiches with perforated faceplates lead to high SAC at low frequencies, which in turn brings about increment in the low frequency STL. Moreover, sandwich panels with triangular cores are found to have the lowest peak frequency in the STL and SAC curves compared with the other kinds of sandwich panels having the same effective mass and perforations.
Starting Page	31
Ending Page	40
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1016/j.apacoust.2019.02.028
Volume Number	152
Alternate Webpage(s)	http://mlms.nuaa.edu.cn/_upload/article/files/5f/96/643c0e50425dbeef04fedbcec953/e2211e5b-1f9c-493b-a2f7-f363532c12cc.pdf
Alternate Webpage(s)	https://acoustique.ec-lyon.fr/publi/meng_applacoust19.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.apacoust.2019.02.028
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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