深海海底山引起的混响杂波联合预报方法
Joint prediction method of bottom reverberation and seamount clutter in deep sea
杨华 1秦继兴 2莫东鹏 3高博3
作者信息
- 1. 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;中国科学院大学 物理学院,北京 100190;中国人民解放军 92578 部队,北京 100161
- 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;中国科学院大学 物理学院,北京 100190
- 3. 中国海洋大学 信息海洋技术学院,山东 青岛 266100
- 折叠
摘要
针对深海复杂海域的主动探测混响杂波干扰的联合工程预报问题,本文基于三维射线-简正波理论建立了深海海底山引起的混响杂波联合预报方法,将海底山当作一类具有强散射特征的体积散射源,提出了对海底山的体积散射函数在水平和垂直维度上进行网格划分的数值积分方法.研究了不同水平方位,不同地形条件下的海底混响和海底山杂波强度特征.实现了小起伏水平海底和海底山地形的深海海底混响和海底山杂波的统一预报.研究结果表明:海底山的体积散射源经过水平和垂直维度的划分后,可以和水平海底的小尺度散射过程形成有效耦合,而海底山杂波的时间尺度和包络强度分别受海底山的水平宽度和垂直高度影响.通过海上实验数据比对,验证了本文所提预报方法的准确性.
Abstract
To address the problem of joint engineering prediction for the active detection of reverberation clutter in-terference in deep-sea complex waters,a joint prediction method for reverberation clutter caused by deep-sea sea-mounts is established based on three-dimensional(3D)ray-normal mode theory.Seamounts are considered a kind of volume scattering source with strong scattering characteristics.A numerical integral method for meshing the vol-ume scattering function of seamounts in horizontal and vertical dimensions is proposed in this paper.In particular,this work examines the characteristics of reverberation and seamount clutter intensity under different horizontal ori-entations and terrain conditions.As such,the unified prediction of the deep sea floor reverberation and seamount clutter of the small fluctuation and seamount clutter is realized.The results show that after the division of the hori-zontal and vertical dimensions,the volume scattering source of the seamount can be effectively coupled with the small-scale scattering of the horizontal seabed.Furthermore,the time scale and envelope intensity of the seamount clutter are affected by the horizontal width and vertical height of the seamount,respectively.The accuracy of the proposed prediction method is then verified by comparing the results with the sea experimental data.
关键词
深海混响/海底山/杂波/混响杂波模型/射线理论/主动声呐/体积散射/混响预报Key words
reverberation in deep sea/seamount/clutter/reverberation and clutter model/ray theory/active sonar/volume scattering/reverberation prediction引用本文复制引用
基金项目
国家自然科学基金项目(12274385)
中国科学院青年创新促进会项目(2021023)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据