船舶辐射噪声是被动声呐工作的依据。船舶辐射噪声仿真解决了辐射噪声实际数据密级程度高、样本量小的问题。本文在已有辐射噪声原理和模型研究成果的基础上，深入研究辐射噪声连续谱和线谱谱级以及频率随着船舶航速、深度和方位角的变化，重新建立了三大噪声源连续谱的数学模型。针对匀减速、下潜、转向以及悬停后加速等几种复杂工况下的辐射噪声进行了仿真，对结果的理论分析表明，仿真船舶辐射噪声信号的时域和频域波形符合预先设定，符合变化规律。
Ship radiated noise is the main information source of passive sonar. Simulation of the noise solves the problems of high level of security and small sample size of radiated noise. Based on the existing research results of radiated noise principles and mathematical model, firstly, the changes of spectral level and frequency of continuous spectrum and line spectrum with ship speed, depth and azimuth are studied. Secondly, the mathematical model of continuous spectrum of three noise sources are established. Finally,the radiated noise under several complex working conditions such as uniform deceleration, diving, steering and acceleration after hovering are simulated. The theoretical analysis of the results shows that the time domain and frequency domain waveforms of the simulated ship radiated noise signal accord with the preset and objective change law.
2023,45(3): 50-55 收稿日期：2022-01-21
DOI：10.3404/j.issn.1672-7649.2023.03.009
分类号：TN911.72；TB56
基金项目：国家重点研发计划（2016YFB0501700）；湖北省教育厅科学技术研究计划指导性项目（B2018325）；武昌工学院博士基金项目（2017BSJ01），武昌工学院校级重点学科“新能源与智能物联”项目（2021XK01）
作者简介：游波(1976-),女,博士,副教授,主要研究方向水声信号处理、海洋声学建模、声呐系统技术
