声源对浅海地震波传播特性的影响研究  

Study on the Influence of Sound Source on Characteristics of Shallow Sea Seismic Wave Propagation

作　　者：赵爽[1] 袁硕 顾丹妮 王远超 王宪楠 郭策安[1] 张健[1] ZHAO Shuang;YUAN Shuo;GU Danni;WANG Yuanchao;WANG Xiannan;GUO Cean;ZHANG Jian(Shenyang Ligong University,Shenyang 110159,China;The Eighth Design Department,the Eighth Research Institute of China Aerospace Science and Technology Corporation Limited,Shanghai 201109,China)

机构地区：[1]沈阳理工大学装备工程学院,沈阳110159 [2]中国航天科技集团有限公司第八研究院第八设计部,上海201109

出　　处：《沈阳理工大学学报》2023年第2期86-94,共9页Journal of Shenyang Ligong University

基　　金：国家装备预研基金(61406190105);辽宁省教育厅科研启动基金(LJKZ0269);沈阳理工大学高水平成果培育建设项目。

摘　　要：为提升水雷的探测能力,利用浅海地震波识别水下目标声源,研究声源高度和频率对浅海地震波的影响。采用交错网格有限差分方法对波动方程进行离散求解,实现不同高度和不同频率声源形成的浅海地震波在砂岩介质中传播过程的仿真模拟,并利用f-k频散能量提取方法,获得浅海地震波的频散能量图。结果表明:声源高度和频率均会影响浅海地震波的传播特性,但对其波速、频率集中范围和极化特性影响较小,Scholte波稳定的波速为1088 m/s,Scholte波振幅的频率范围在5~30 Hz之间;随着声源高度和频率的增加,形成的Scholte波在水下界面信号减弱。研究结果可为水雷引信的研制提供理论依据。To improve the ability to detect mines,shallow sea seismic waves are used to identify underwater target sound sources,and the influence of sound source height and frequency on shallow sea seismic waves is studied.The staggered grid finite difference method is used to discretize the wave equation to realize the simulation of the propagation process of shallow sea seismic waves formed by sound sources with different heights and frequencies in the sandstone medium,and the f-k dispersion energy extraction method is used to obtain the dispersion energy map of shallow sea seismic waves.The results show that both the height and frequency of the sound source will affect the propagation characteristics of shallow sea seismic waves,but have little influence on the wave velocity,frequency concentration range,and polarization characteristics.The stable wave velocity of the Scholte wave is 1088 m/s,and the frequency of the Scholte wave amplitude is concentrated between 5 and 30 Hz;With the increase of sound source height and frequency,the shallow sea seismic wave signal formed at the underwater interface weakens.The research results can provide a theoretical basis for the development of mine fuze.

关 键 词：声源 浅海地震波 Scholte波 f-k频散能量提取 

分 类 号：U674.7[交通运输工程—船舶及航道工程]