【作者】 欧焱青； 黄益旺；

【Author】 OU Yan-qing;HUANG Yi-wang;Science and Technology on Underwater Acoustic Laboratory,Harbin Engineering University;College of Underwater Acoustic Engineering,Harbin Engineering University;

【机构】 哈尔滨工程大学水声技术重点实验室； 哈尔滨工程大学水声工程学院；

【摘要】 海洋环境噪声场是声呐系统的主要背景干扰场。只有深刻认识海洋环境噪声的时域、频域和空域等特性,才能正确地评价声纳装备的性能,提高声呐性能和作用距离。本文分别在Kuperman提出的简正波模型和Harrison提出的射线模型基础上,推导了风成表面噪声源作用下噪声场谱级和空间相关函数的表达式。根据仿真了中国南海某海区实际波导环境下噪声场空间特性,并对两种模型计算结果进行对比分析。研究表明两种模型基本可以相互验证,此外,仿真结果表明:噪声强度随着频率增加而减弱,噪声谱级和垂直相关性受声速影响比较明显,在非均匀声速下噪声场垂直相关性不仅仅和垂直间距有关,还和其空间位置有关。更多还原

【Abstract】 The ocean ambient noise is the main background interference of sonar system. Mastering the magnitude and spatial and temporal variation characteristics of ambient noise can be applied to predicting sonar operating rang and improving their ability of anti-interference.This paper derived the noise level and spatial correlation function generated by surface-generated noise in horizontal stratified medium by using normal mode model proposed by Kuperman and ray model proposed by Harrison. Comparative analysis with the simulation results under specific environment showed that the two models above can be verified with each other in modeling ambient noise.Noise intensity diminishes with increasing frequency.The variation of sound speed and reference depth have effects on the characteristics of ocean ambient noise.更多还原