Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27668
Title: The effect of modal energy transfer on the sound radiation and vibration of a curved panel : theory and experiment
Authors: Lee, YY
Su, RKL
Ng, CF
Hui, CK
Issue Date: 2009
Publisher: Academic Press
Source: Journal of sound and vibration, 2009, v. 324, no. 3-5, p. 1003-1015 How to cite?
Journal: Journal of sound and vibration 
Abstract: This study is the first work to consider the sound radiation of a panel subject to 2:1 internal resonance. The research also furthers the experimental work of a previous paper that did not make use of 2:1 internal resonance for sound reduction and failed to tune the frequency ratio of the first symmetric and anti-symmetric modes of the curved structure close to two. The results indicate that when the ratio of the resonant frequencies of the first bending symmetric and anti-symmetric modes is close to two, and the excitation frequency is equal to the resonant frequency of the first symmetric mode, the contribution of the first anti-symmetric mode is significant, even though the curved panel and excitation are symmetrical. This is because a large amount of the vibration energy is transferred to the anti-symmetric mode, whose sound radiation efficiency is much lower than that of the symmetric mode. Thus, the total sound radiated from the panel is reduced.
URI: http://hdl.handle.net/10397/27668
ISSN: 0022-460X
EISSN: 1095-8568
DOI: 10.1016/j.jsv.2009.02.042
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