【作者】 钟昆； 李东杰；

【Author】 ZHONG Kun;LI Dong-jie;Institute of electronic engineering in China academy of engineering physics;

【机构】 中国工程物理研究院电子工程研究所；

【摘要】 舰船辐射噪声的主要成分是螺旋桨低频线谱噪声,在对舰船噪声监测中会混入海洋背景噪声。分析近海环境噪声特性,发现其功率谱具有一定的形状,从而可以通过滤波可以对其进行仿真;而螺旋桨的低频线谱噪声,可通过螺旋桨叶数、转速及谐波次数等参数加以仿真。在对二者进行仿真的基础上,建立近海环境噪声下舰船的低频线谱噪声信号,并为进一步分析舰船在近海环境中的辐射噪声提供了一种方法,为声引信优化设计奠定了基础。更多还原

【Abstract】 The main component of ship radiated noise is the low frequency line spectrum noise of propeller.The ocean ambient noise will affect it when we monitor the ship’s propeller noise.A result that the power spectrum has a stable shape can be made through analysing the coastal ocean environment noise character,and simulation to the coastal ocean ambient noise could be realized by the spectrum filter.The low frequency line spectrum noise is able to simulated with some parameters,including the number of propeller blades,propeller rotate speed and the harmonic order.Based on the two simulations,a ship radiated low frequency line spectrum noise signal in coastal ocean is built,and further more it provides a method to analyse the ship radiated noise in coastal ocean.更多还原