摘要
关于水下航行器噪声的测量,目前对测量设备和方法进行了广泛而又卓有成效的研究,但是研究海洋环境对水下航行器噪声测量的影响较少。文章对水下航行器进行仿真,根据虚源法和射线声学理论来模拟海洋波导环境,设计恒束宽垂直阵来测量不同海水深度、不同声源位置以及不同声速梯度下海洋环境对测量结果的影响。通过研究得到了上述不同情形下水下航行器噪声测量的误差值。仿真研究表明:浅海海域航行器宽带(20 Hz^1 kHz)噪声测量误差最大可达1.8 dB,海水越深对噪声测量的影响越小;声源位置靠近水体边界时,航行器宽带噪声测量误差可达1.5 dB,在海水水体中间位置测量时误差较小;在不同声速梯度时,航行器宽带信号测量误差在1.5 dB以内。
At present,with regard to the measurement of underwater vehicle noise,the measurement equipment and methods of underwater vehicle noise have been extensively and effectively studied by many experts and scholars,but fewer people studied the impact of marine environment on the measurement of underwater aircraft noise.In this paper,the underwater vehicle is simulated,and the ocean waveguide environment is also simulated according to the virtual source method and the theory of ray acoustics,and the constant beam width vertical array is designed to measure the impact of the marine environment on the measurement results such as different seawater depths,different sound source positions,and different sound velocity gradients.Through the research,the error of the underwater vehicle noise measurement is obtained under the above different marine conditions.The research shows that under different seawater depths in the simulation,the maximum noise measurement error of the aircraft broadband(20 Hz1 kHz)is 1.8 dB,and the deeper the seawater,the less the impact on noise measurement.When the sound source is close to the boundary of the seawater,the measurement error of the broadband noise of the aircraft is 1.5 dB.And the error is small when measuring the noise of aircraft at the middle position of the seawater.With regard to the different sound velocity gradients,the measurement error of the aircraft wideband signal is within 1.5 dB.
作者
徐贺
孔德义
钱玉洁
XU He;KONG Deyi;QIAN Yujie(Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;State Key Laboratory of Transducer Technology, Institute of Intelligent Machines of Chinese Academy of Sciences, Hefei 230031, China;Key Laboratory of Biomimetic Sensing and Advanced Robot Technology of Anhui Province, Institute of Intelligent Machines of Chinese Academy of Sciences, Hefei 230031, China;College of IOT Engineering, Hohai University, Changzhou 213022, China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2020年第8期1070-1074,1081,共6页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(11774355,11604077)。
关键词
波导环境
海洋环境
航行器
噪声测量
误差修正
waveguide environment
marine environment
aircraft
noise measurement
error correction
