有限潜深圆柱壳低频矢量声场特性分析  

Low-frequency vector sound field characteristic analysis of a cylindrical shell with finite submerged depth

作　　者：杨德森 王文博[3] 时洁[1,2,3] 张宇涵 YANG Desen;WANG Wenbo;SHI Jie;ZHANG Yuhan(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]海洋信息获取与安全工业与信息化部重点实验室(哈尔滨工程大学),黑龙江哈尔滨150001 [3]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2020年第2期166-174,共9页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(11674074)

摘　　要：为解决复杂结构水下矢量声场预报问题,本文基于单元辐射叠加法,结合镜像法建立了有限潜深圆柱壳的声场修正模型,结合具体算例分析了有限潜深圆柱壳低频辐射声场分布特性和传播特性。研究结果表明:单元辐射叠加法与传统边界元法计算得到的结构远场辐射噪声结果具有良好的一致性;受自由液面影响,圆柱壳的辐射声场有深度方向上的波动特性;对声场矢量信息的研究显示,在远离圆柱壳的声场中,声能量更多地沿水平方向传播;在远距离固定场点辐射声压及振速随浸没深度变化的曲线上,峰值间距与介质声波波长之比是定值,不随频率变化。研究结论可为结构辐射声预报、噪声控制及噪声测量等工作提供理论依据和有用的先验信息。To solve the problem of underwater vector sound field prediction for complex structures, on the basis of the element radiation superposition method(ERSM) modified by the image method, the acoustic model of a cylindrical shell with finite submerged depth was established. The sound distribution and propagation characteristics of the cylindrical shell were analyzed by numerical simulations. The research shows that the results of the modified ERSM and boundary element method are in good agreement. Fluctuation characteristics exist in the sound field of the cylindrical shell study of the sound engergy flow shows that sound power mainly propagates along the horizontal direction at far distance. In addition, the fluctuation characteristics of the sound pressure and particle velocity at a certain observation point versus the depth was studied. The results showed that the distance between two adjacent peaks has a fixed numerical correspondence with the acoustic wavelength in the fluid, which does not vary with frequency. These findings can provide the theoretical basis and useful apriori information for sound prediction, noise control, and noise measurement.

关 键 词：自由液面 圆柱壳 单元辐射叠加法 镜像法 声场矢量信息 

分 类 号：P733.24[天文地球—物理海洋学]