Page 109 - 应用声学2019年第4期

第 38 卷 第 4 期 Vol. 38, No. 4
2019 年 7 月 Journal of Applied Acoustics July, 2019

⋄ 李启虎院士八十华诞学术论文 ⋄

低频大孔径线列阵声呐在海底反射区的

测向性能分析 ∗

韩志斌 1,3 彭朝晖 2† 刘 扬 3

(1 中国科学院大学 北京 100049)

(2 中国科学院声学研究所 声场声信息国家重点实验室 北京 100190)
(3 中国人民解放军 92578 部队 北京 100161)
摘要 与深海直达声探测、会聚区探测不同，在海底反射声探测模式下，低频大孔径线列阵声呐采用常规阵列
信号处理方法，会产生测向误差增大和方位分裂等测向性能下降现象。目前，关于海底反射声探测模式下测向
性能下降程度的预报、测向性能下降现象出现的区域位置预报等方面尚缺乏研究。该文针对该问题，提出一套
海底反射区声呐测向性能预报方法。该方法以深海声场存在简正波簇现象及高阶简正波簇在角谱域分布具有
稳定性等分析结论为支撑，提出高阶简正波簇角谱域分布向空域分布的转换方法、高阶简正波簇引起的测向
误差量值预报方法、不同高阶简正波簇干涉产生多目标现象的条件的计算方法，实现了对低频大孔径线列阵
声呐在深海海底反射区不同位置的测向误差预报、目标方位分裂现象产生的位置和目标角度范围要求预报。
关键词 深海低频声场，简正波分布，海底反射区
中图法分类号: P733.2；TB566 文献标识码: A 文章编号: 1000-310X(2019)04-0569-11
DOI: 10.11684/j.issn.1000-310X.2019.04.014

Deep water azimuth predication using bottom bounce sound received
by a low frequency large aperture linear array

HAN Zhibin 1,3 PENG Zhaohui 2 LIU Yang 3

(1 China University of Chinese Academy of Sciences, Beijing 100049, China)
(2 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(3 Unit 92578 of PLA, Beijing 100161, China)

Abstract Different from direct sound detection and convergence zone detection, there are limitations while
conventional array signal processing applying in bottom bounce sound areas, including phenomenon as direction
error increasing and azimuthal splitting. So far, the areas where the phenomenon exists and the predication
of decline degree are to be studied. Aiming at issues above, the paper develops a method for deep water
azimuth predication. First, the paper submits concepts of normal mode cluster and verifies the stability of
high normal mode cluster in angular spectrum. Based on these, the paper develops the method deriving the
spatial distribution of normal mode cluster using the position in angular spectrum, and the method predicating
the direction error arousing by each high normal mode cluster, and the method for calculating azimuthal
splitting conditions caused by the interference of two normal mode clusters. Above all, the method realizes the
predication of the areas where the phenomenon exists and the decline degree.
Key words Low frequency sound field in deep sea, Normal mode distribution, Bottom bounce sound area

2019-02-12 收稿; 2019-04-05 定稿
国家自然科学基金项目 (11434012)
∗
作者简介: 韩志斌 (1985- ), 男, 河北邢台人, 博士研究生, 研究方向: 水声物理。
† 通讯作者 E-mail: pzh@mail.ioa.ac.cn