噪声与振动控制2019，Vol.39Issue(3)：11-17,34,8.DOI:10.3969/j.issn.1006-1355.2019.03.003
不同耦合模式水下结构声辐射计算方法研究
Study on the Acoustic Radiation Calculation Method for Underwater Structures with Different Coupling Modes
摘要
Abstract
For the acoustic radiation prediction of underwater double cylindrical shell, the FE-IBEM method based on fluid-structural interaction and the FE-IBEM method based on acoustic-structural interaction are used respectively to calculate underwater acoustic radiation. The difference between the two algorithms is discussed in the aspects of theory and computational performance. Besides, the two algorithms are verified by a numerical example. In addition, the effects of thickness and spacing of the ring frames on the underwater radiation noise of the double cylindrical shell are studied. The results show that since the fluid-structural interaction model neglects the compressibility of the fluid, the computation result of the acoustic radiation is larger than the actual value. While the interaction effect between the fluid and the structure is fully considered in the acoustic-structural interaction model, which leads to the reasonable calculation results. The solution results of the two interaction modes are close in the range of 0-12 Hz, but there is a large difference between them in the range of 12 Hz -200 Hz. The FE-IBEM method based on acoustic-structural interaction model is a preferred method for calculating the underwater radiation noise of structures. Rationally selecting the ring frames spacing and increasing the thickness of the ring frames can reduce the underwater radiation noise of structures in medium and low frequency ranges.关键词
声学/水下声辐射/声固耦合/流固耦合/有限元-边界元法/减振降噪Key words
acoustics/ underwater acoustic radiation/ acoustic-structural interaction/ fluid-structural interaction/ FEM-IBEM/ vibration and noise reduction分类
通用工业技术引用本文复制引用
蒋坤,向阳,张波..不同耦合模式水下结构声辐射计算方法研究[J].噪声与振动控制,2019,39(3):11-17,34,8.基金项目
国家自然科学基金资助项目(U1734201) （U1734201）
牵引动力国家重点实验室自主研究课题(2017TPL_T05) （2017TPL_T05）
中央高校基本科研业务费专项资金资助项目(2682016CX126) （2682016CX126）
