| 刘崇磊,李涛,尹力,黄海宁.北极冰下双轴声道传播特性研究[J].,2016,35(4):309-315 |
| 北极冰下双轴声道传播特性研究 |
| Acoustic propagation properties of two-axes channel under sea ice in the Arctic |
| 投稿时间：2015-10-21 修订日期：2016-06-27 |
| 中文摘要: |
| 本文利用第六次北极科学考察的所得的楚科奇海温盐深数据，开展了北极海域声传播特性研究。通过引入Diachok海冰散射模型，将海冰界面模拟为无限椭圆形半圆柱体在自由界面的随机分布，利用Twersky散射理论计算了海冰的反射系数。使用简正波中的KRAKENC模型，结合海冰参数，进行了传播损失仿真分析。研究表明，北极的双声道波导中表面声道的传播特性与声源频率和收发深度紧密相关。深海声道与北极典型声速结构的传播特性一致，具有频率选择特性，在20Hz左右时传播特性较为理想。此外，在远程传播时，深海声道的传播特性要优于表面声道。 |
| 英文摘要: |
| This paper conduct the research of the acoustic propagation property in Arctic using the CTD data in Chukchi Sea of the sixth Arctic scientific exploration. We introduce the Diachok ice scatter model that modeled thewater-iceboundaryasa randomdistributionof infiniteellipticalhalf-cylinders fixedto a freesurface and compute the ice reflectivity using the Twersky scattering theory. Then we make the analyses of the transmission loss using the KRAKENC model which based on normal mode theory combining with the ice scattering theory. We conclude that in the condition of double channel, the transmission of thesurface guide corresponds closely to frequency and sender-receiver depth.While the SOFAR channel is more stable than the surface guide and the propagation property is consistent with the typical Arctic sound speed structure which has a selective property of frequency and arelatively ideal frequency at 20Hz. What’ more, in the far distance, SOFAR channel has a better performance in comparison with surface guide. |
| DOI：10.11684/j.issn.1000-310X.2016.04.005 |
| 中文关键词: 北极声学,海冰散射模型,简正波,传播损失 |
| 英文关键词: Arctic acoustic, Sea ice scatter theory, Normal mode, Transmission loss |
| 基金项目: |
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