极地研究2017，Vol.29Issue(2)：194-203,10.DOI:10.13679/j.jdyj.2017.2.194
平面冰层覆盖下水中声传播损失特性分析
CHARACTERISTIC ANALYSIS OF ACOUSTIC TRANSMISSION LOSS IN WATER UNDER PLANE ICE COVER
摘要
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 phys-ical 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.关键词
冰层/反射系数/传播损失/水声信道Key words
ice sheet/reflection coefficient/transmission loss/underwater acoustic channel引用本文复制引用
陈文剑,殷敬伟,周焕玲,朱广平,孙辉..平面冰层覆盖下水中声传播损失特性分析[J].极地研究,2017,29(2):194-203,10.基金项目
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 （11404077）
