噪声与振动控制Issue(2)：22-27,6.DOI:10.3969/j.issn.1006-1335.2014.02.006
阻尼层对水下圆柱壳辐射声场的去耦特性影响
Decoupling Characteristic of Viscoelastic Damping Layer and Its Influence on Sound Radiation Field of Underwater Cylindrical Shell
摘要
Abstract
Based on modal superposition method, a model of vibration and sound radiation of underwater cylindrical shell with viscoelastic damping layer is established. In this model, the behavior of the damping layer is described with Navier equation. Numerical results of this model are obtained. The decoupling characteristic of the viscoelastic damping layer to the sound radiation field of the underwater cylindrical shell is investigated by analyzing the mean square velocity of radial vibration and the sound radiation power of the cylindrical shell. The results show that the frequency response curve of the mean square velocity of the radial vibration of the viscoelastic damping layer can be divided into three intervals according to the frequencies. Only in the interval of significantly high frequencies, the sound radiation power can be reduced by the viscoelastic damping layer. Thickness of the damping layer has larger influence on the decoupling effect than the thickness of the shell does.关键词
振动与波/粘弹性阻尼层/模态叠加法/水下圆柱壳/去耦特性Key words
vibration and wave/viscoelastic damping layer/modal superposition method/underwater cylindrical shell/decoupling characteristic分类
通用工业技术引用本文复制引用
张超,商德江,李琪..阻尼层对水下圆柱壳辐射声场的去耦特性影响[J].噪声与振动控制,2014,(2):22-27,6.基金项目
中央高校基本科研业务费专项资金资助 （）
