The sound radiation analysis of a submerged structure with viscoelastic layer

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (18) : 122-127.

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The sound radiation analysis of a submerged structure with viscoelastic layer

WANG Xian-zhong ,SUN Long-quan, QIU Zhong-hui , ZHENG Lü

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Abstract

Based on Statistic Energy Analysis method, the sound radiation characteristic of submerged finite cylindrical shell with damping layers. The validity of Statistic Energy Analysis method is proved by comparing with test result of cylindrical shell model. Then the sound radiation pressure of submerged structure which partially covered with a damping layer. The influence of sound radiation of submerged structure resulting from different laying rate and damping loss factor are analyzed. The research shows that the structure loss factor has great effect on the noise reduction effect of submerged structure which is covered with the viscoelastic layer partially.

Key words

viscoelastic layer / sound radiation / loss factor / Statistic Energy Analysis / laying rate

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WANG Xian-zhong;SUN Long-quan;QIU Zhong-hui;ZHENG Lü. The sound radiation analysis of a submerged structure with viscoelastic layer[J]. Journal of Vibration and Shock, 2012, 31(18): 122-127