水下船舶低频段典型单机工况下声辐射特性研究

该文旨在探讨潜艇各设备单机工作下引起的船舶结构水下声辐射特性。基于ABAQUS声固耦合算法模拟水下结构在无限流场中的声辐射问题,对潜艇结构进行各种单机工况低频段的频域内的计算和分析。首先找出各工况下流场中辐射声压随频率的变化规律及沿船长的分布规律,再比较出各个设备单机工作时对声辐射的贡献量大小,以便针对不同工作频率段的噪声主要振动源,采取浮筏等隔振措施。由此可见,开展各个设备单机激励作用下的潜艇水下辐射噪声特性分析,对于提高潜艇水下声隐身能力具有重要意义。

Study on ship underwater acoustic radiation under single-unit operating condition during low frequency

This paper aims at researching the underwater acoustic radiation characteristics of the ship structure for the submarine equipments under the single-unit operating condition. Based on the structural-acoustic coupling method ABAQUS, this paper simulates the acoustic radiation problem of the submerged structure in an infinite flow field, computes and analyzes the submarine structure under the single-unit operating condition during a low frequency. It firstly studies the variation of the radiated acoustic pressure in a flow field with a frequency and its longitudinal distribution. Then it compares the radiation pressure brought by different equipments in order to adopt vibration isolation measure,such as floating raft,for main vibration source causing noise under the different working frequency. Therefore the research on the underwater radiation noise characteristics of the submarine equipments under the single-unit operating condition is of great significance to improve the acoustic stealth ability of submarines.