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热带海洋学报 ›› 2011, Vol. 30 ›› Issue (3): 46-50.doi: 10.11978/j.issn.1009-5470.2011.03.046cstr: 32234.14.j.issn.1009-5470.2011.03.046

• 海洋物理学 • 上一篇    下一篇

浅海爆炸声传播损失及简正波分离实验研究

刘立勇, 王婷婷   

  1. 南海舰队海洋水文气象中心, 广东 湛江 524001
  • 收稿日期:2009-07-24 修回日期:2010-10-22 出版日期:2011-07-18 发布日期:2011-07-20
  • 作者简介:刘立勇(1982—), 男, 山东省潍坊市人, 助理工程师, 从事海洋水文方面的研究。E-mail: llyswc@163.com

Research on transmission loss of explosive sound in shallow water and normal mode extraction

LIU Li-yong, WANG Ting-ting   

  1. Naval Oceangraphic Hydrometeorological Centre of South China Sea Fleet, Zhanjiang 524001, China
  • Received:2009-07-24 Revised:2010-10-22 Online:2011-07-18 Published:2011-07-20

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1 | 1

摘要：

文章简要介绍了浅海声传播损失的研究背景和基本理论方法。通过 1/3 倍频程滤波对浅海爆炸宽带信号的不同频段在浅海的传播损失情况进行了分析, 描述了浅海环境对声传播损失的影响; 同时在不知道先验信息的条件下, 利用垂直阵声压数据成功地进行了简正波分离, 并与理想条件下Kraken简正波模型计算出的结果进行了比较分析。

关键词: 浅海, 垂直阵, 传播损失, 简正波

Abstract:

Abstract: The paper presents research background and basic theory and method of acoustic transmission loss in the shallow water. The effects due to sound transmission loss by shallow water environment are described through analyzing the transmis- sion loss with explosive sound signal at different frequency range filtered by third octave. With no priori knowledge, the nor- mal modes are successfully extracted from the sound pressure data derived from the vertical liner receiver arrays (VLAs). The comparison of normal modes extracted and calculated by Kraken Mode Model is also presented.

Key words: shallow water, vertical liner receiver array (VLA), transmission loss, normal mode