浅海目标辐射噪声测量中声聚焦现象引起的误差分析及修正  

Error analysis and correction due to shallow water acoustic focusing in radiated noise measurement

作　　者：杨德森[1] 胡鹏涛[1,2] 

机构地区：[1]哈尔滨工程大学水声技术国防科技重点实验室 [2]海军91388部队

出　　处：《振动与冲击》2010年第1期62-67,237,共6页Journal of Vibration and Shock

基　　金：十一五国防基础科研资助项目(B0820060400);国家自然科学基金(40827003)

摘　　要：研究了浅海近距离声聚焦特性及其对目标辐射噪声测量的影响和修正方法。利用基于射线理论的虚源法,建立了典型声源和复合声源的声场计算模型,通过具体算例分析了声聚焦引起的测量误差,将单点测量模型和阵列多点测量模型进行对比,并进行湖上试验验证,结果表明阵列多点测量模型能有效的对信道空间传递函数平滑,为如何减小声聚焦对目标辐射噪声测量的影响提供了依据,有助于实际工程测量的数据分析和测量精度的提高。Study was conducted on the characteristics of shallow water acoustic focusing within measuring distance, its influence on the radiated noise measurement and the corresponding correction.Based on the image source method in Ray Theory,a calculating model for the acoustic field of typical sound sources and complex sound sources was established. Then,the measurement errors induced by acoustic focusing were analyzed.Comparing the spot measurement model with the multimetering model,through lake testing,the results showed that the array multimetering model can smooth the channel transfer function,it provides a foundation for reducing the influence of acoustic focusing on radiated noise measurement,and helps to analyse data and improve the accuracy of measurement.

关 键 词：浅海 声聚焦 噪声测量 虚源法 

分 类 号：TB535[理学—物理]