一种获取船舶主要噪声源参数的方法  

A method of obtaining ship main noise sources parameters

作　　者：孟春霞[1] 杨士莪[1] 李桂娟 

机构地区：[1]哈尔滨工程大学水声工程学院,哈尔滨150001 [2]大连测控技术研究所,辽宁大连116013

出　　处：《大连海事大学学报》2007年第4期24-27,共4页Journal of Dalian Maritime University

基　　金：水下测控技术国防科技重点实验室基金资助项目(9140C260102070C26)

摘　　要：为了确定船舶主要辐射噪声源的声源参数,在分析辐射噪声特性及其传播规律的基础上,建立一个浅海波导条件下船舶主要辐射噪声源的数学模型.在不同信噪比条件下,利用快速场积分的方法计算船舶宽带辐射噪声的近场声压,并以全局概率优化搜索方法遗传算法作为反演工具,求解由近场声压数据构成的非线性方程组,从而得到辐射噪声源的参数.仿真结果表明,在浅海波导条件下,在信噪比高于15 dB时,该数学模型可有效反演出船舶主要辐射噪声源的声源参数.A mathematical inversion model of parameters for the main sources of ship-radiated noise was built under shallow water waveguide based on radiation characteristic of noise and its propagation rules. Under different signal-to-noise ratio conditions, the near-field sound pressure of broadband radiation noise was computed by fast field program, and the genetic algorithm was used as the inverse tool. The parameters for the main sources of ship-radiated noise are obtained by computering nonlinear equation groups composed of near-field sound pressure data. Simulation results show that when SNR is above 15dB under shallow water waveguide, the mathematical inversion model can obtain sources parameters effectively.

关 键 词：船舶 主要噪声源 参数反演 遗传算法 

分 类 号：TB53[理学—物理]