Page 119 - 《应用声学》2023年第4期

第 42 卷 第 4 期 Vol. 42, No. 4
2023 年 7 月 Journal of Applied Acoustics July, 2023

⋄ 研究报告 ⋄

水中分层弹性球壳高频时域回波的声学编码研究 ∗

丁 栋 陈昌雄 1 孔慧敏 1 范 军 2 彭子龙 1†

(1 江苏科技大学能源与动力学院 镇江 212100)
(2 上海交通大学 海洋工程国家重点实验室 上海 200240)

摘要：针对水下集群目标及敌我目标识别的难题，该文提出了一种基于水中分层弹性球壳高频时域回波的声
学编码原理及方法。推导了水中 4 层弹性球壳目标散射声压的简正级数解，并与有限元结果进行了对比验证。
通过构造高频主动声呐的探测脉冲信号，与 4 层弹性球壳声传递函数的简正级数解做卷积运算，获得了目标的
时域回波脉冲序列。研究了分层弹性球壳的厚度、各层材料属性、排布顺序等对时域回波特征的影响规律，提
出了基于时域回波特征的声学编码方法。研究表明：利用水中分层弹性球壳目标高频时域回波特征能够实现
声学编码，回波结构稳定，且不受限于探测方向。通过携带或安装这种分层弹性球壳结构，有望识别水下航行
体/悬浮体等目标。该文的研究对水下目标的主动探测身份识别及导航等具有一定的参考价值。
关键词：时域声学编码；回波特征；弹性球壳；身份识别
中图法分类号: TB566 文献标识码: A 文章编号: 1000-310X(2023)04-0781-11
DOI: 10.11684/j.issn.1000-310X.2023.04.014

Acoustic coding based on high frequency time domain echo of layered elastic
spherical shells in water

DING Dong 1 CHEN Changxiong 1 KONG Huimin 1 FAN Jun 2 PENG Zilong 1

(1 School of Energy & Power Engineering, Jiangsu University of Science & Technology, Zhenjiang 212000, China)
(2 State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract: For the difficult problem of underwater cluster target and enemy target identification, an acoustic
coding principle and method based on the high-frequency time-domain echo of layered elastic spherical shells
in water is proposed in this paper. The simple positive series solution of the scattered acoustic pressure of a
target with four layers of elastic spherical shells in water is derived and compared with the finite element results
for verification. The time-domain echo pulse sequence of the target is obtained by constructing the detection
pulse signal of high-frequency active sonar and doing the convolution operation with the simple positive series
solution of the acoustic transfer function of the four-layer elastic spherical shell. The influence law of the
material thickness properties and arrangement order of each layer of the layered elastic spherical shell on the
time-domain echo characteristics is studied, and the acoustic coding method based on the time-domain echo
characteristics is proposed. It is shown that the acoustic coding can be achieved by using the high-frequency
time-domain echo characteristics of the layered elastic spherical shell target in water, and the echo structure is

2022-04-08 收稿; 2022-05-23 定稿
江苏省自然科学青年基金项目 (BK20200995), 基础加强计划技术领域基金项目 (2020-JCJQ-JJ-228), 基础加强计划重点项目
∗
(2020-JCJQ-ZD-222)
作者简介: 丁栋 (1995– ), 男, 河南信阳人, 硕士研究生, 研究方向: 水中目标声学特性。
† 通信作者 E-mail: zlp_just@sina.com