极地研究

极地研究 ›› 2017, Vol. 29 ›› Issue (2): 194-203.DOI: 10.13679/j.jdyj.2017.2.194

• 研究论文 • 上一篇    下一篇

平面冰层覆盖下水中声传播损失特性分析

陈文剑  殷敬伟  周焕玲  朱广平  孙辉   

  1. 哈尔滨工程大学水声技术重点实验室, 黑龙江 哈尔滨 150001;
    哈尔滨工程大学水声工程学院, 黑龙江 哈尔滨 150001
  • 收稿日期:2016-03-09 修回日期:2016-06-12 出版日期:2017-06-30 发布日期:2017-06-30
  • 通讯作者: 陈文剑
  • 基金资助:

    国家自然科学基金 (11404077)、大连理工大学海岸和近海工程国家重点实验室开放课题基金 (LP1501)和中央高校基本科研业务费专项资金 (heucfd1506, heucfx1505) 资助

Characteristic analysis of acoustic transmission loss in water under plane ice cover

Chen Wenjian, Yin Jingwei, Zhou Huanling, Zhu Guangping, Sun Hui   

  • Received:2016-03-09 Revised:2016-06-12 Online:2017-06-30 Published:2017-06-30
  • Contact: Wen-Jian CHEN

PDF (PC)

454

被引次数

2

摘要：

理论计算了冰层的声波反射系数, 分析了平面冰层覆盖下水中声传播损失特性。将冰层视作平面覆盖层, 建立了“空气-冰层-水”结构的冰层反射物理模型, 结合冰中的物理声学参数, 得到冰层反射系数; 利用Bellhop海洋声学传播模型得到冰层覆盖下声场的传播损失, 对比分析了传播损失与声波频率、声源深度的关系; 结合冰层反射系数计算结果, 解释了冰下信道具有频率选择性的原因。结果表明, 冰层覆盖下声场传播具有明显的频率选择性, 这种频率选择性是由声波频率和冰层厚度共同决定的。

关键词: 冰层, 反射系数, 传播损失, 水声信道

Abstract:

The acoustic reflection coefficient of the ice layer is calculated, and the characteristics of acoustic propagation loss in the surface layer are analyzed. The ice layer is approximated as a flat cover, and a physical model of ice reflection is established. The reflection coefficient of ice layer is calculated based on the physical acoustic parameters of ice. The sound field propagation loss under the ice cover is obtained using the Bellhop ocean acoustic propagation model, and the relationship between the propagation loss and the acoustic frequency or the sound source depth is analyzed. The reason for the frequency selectivity of the ice channel can be explained based on the calculation results of the reflection coefficient of the ice layer. The results show that the propagation of sound field under the ice cover has obvious frequency selectivity, which is determined by sound wave frequency and the thickness of the ice layer.

Key words: ice sheet, reflection coefficient, transmission loss, underwater acoustic channel