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《Study on Noise Suppressing Performance of Constrained Layer Damping Structure》
YANG Qing;WANG Xin;ZHANG Wenwei;Zhu Jie
2010, 30 (4):
150-152.
DOI: 10.3969/j.issn.1006-1355.2010.04.038
Constrained layer damping, as one type of the surface damping methods, is usually applied to solve the vibration and noise problems of metal plate structures. The loss factor and storage modulus of the damping material are usually used to evaluate the damping performance of the material. But this method can not be employed to evaluate the vibration and noise control performance of the constrained layer damping effectively and directly. In this paper, a new method is introduced to solve this problem. In this method, sinusoidal scanning is adopted and the vibration of a simply supported beam is excited by the quasiwhite noise random vibration. Through the analysis of the response, the vibration and noise control effect of the constrained layer damping is expressed.
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