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Shock and Vibration
Volume 2017 (2017), Article ID 6980501, 8 pages
Research Article

Experiment and Simulation Analysis on Noise Attenuation of Al/MF Cylindrical Shells

1Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics, Wuhan University of Technology, Wuhan, Hubei 430070, China
2Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Liuzhou, Guangxi 545006, China
3Department of Mechanical Engineering, Henan Mechanical and Electrical Vocational College, Xinzheng, Henan 451191, China

Correspondence should be addressed to Shilin Yan

Received 15 June 2017; Accepted 28 September 2017; Published 26 October 2017

Academic Editor: Tai Thai

Copyright © 2017 Bin Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


For the issue concerning internal noise reduction of Al-made cylindrical shell structure, the noise control method of laying melamine foam (MF) layer is adopted for in-shell noise attenuation experiments of Al and Al/MF cylindrical shells and corresponding internal noise response spectrograms are obtained. Based on the Virtual.Lab acoustics software, a finite element model is established for the analysis of noise in the Al/MF cylinder shell and numerical simulation computation is conducted for the acoustic mode and in-shell acoustic response; the correctness of the finite element model is verified via comparison with measured data. On this basis, influence rules of different MF laying rate and different laying thickness on acoustic cavity resonance response within the low and medium frequency range of 100–400 Hz are studied. It is indicated that noise reduction increases with MF laying rate, but the amplification decreases along with the rising of MF laying rate; noise reduction per unit thickness decreases with the increase of laying thickness, while noise reduction per unit area increases.