Research on vibration and near-field soundradiation of ring-ribbed cylindrical shell coated deadening and decoupling materials

• Published in: Journal of marine science and application 2007, Vol.6 (1), p.21-30
• Main Author: YAO Xiong-liang LIU Qing-jie YU Xiu-bo
• Format: Article
• Language: English
• Subjects: 圆柱壳体; 模型试验; 水下流体-结构耦合振动; 环形肋架; 解耦材料; 近场声发射; 隔音材料
• ISSN: 1671-9433; 1993-5048

The research on structural vibration and sound radiation of underwater ring-ribbed cylindrical shell, which is coated with a kind of deadening and decoupling materials, becomes a focus in recent years. This paper analyzes the problem on two aspects： model experiment and numerical calculation. The model experiment is carried out including three cases firstly, in which the structural vibration response and radiating acoustic field are measured respectively, and the results gained in these three cases are analyzed to discuss the effect of reducing structural vibration and radiating noise of the deadening and decoupling materials. The coupling FEM/BEM and the SEA methods are both used in numerical calculation, i.e. the arithmetic of the coupling FEM/BEM method is adopted to calculate the low frequency characteristics and the SEA method is adopted to calculate the medium-high frequencies characteristics of the model. By comparing experimental results with numerical calculation results, it is proved that the algorithm adopted in this paper is reasonable.