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《Journal of Vibration and Shock》 2015-04
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A method for calculating acoustic ray in unstratified ocean

TANG Jun-feng;YANG Shi-e;PIAO Sheng-chun;State Laboratory of Underwater Acoustic Technology,Harbin Engineering University;  
The horizontal variations of sound speed profile and ocean water depth have a significant effect on acoustic propagation in shallow sea water. Here,a method for calculating sound travel time based on the ray theory in unstratified ocean was proposed. An efficient algorithm was applied to seek eigen acoustic rays arriving at hydrophones.The sound speed profile could be described approximately using empirical orthogonal functions( EOFs) with a proper precision. The coefficients of EOFs vary linearly with horizontal distance in a certain sea area. It was shown that the proposed method can be used to calculate the travel time of eigen-acoustic rays arriving at hydrophones rapidly with a higher precision,it can be used for fast inversion of sound speed profile in ocean.
【Fund】: 哈尔滨工程大学基础研究基金(HEUFT07024)
【CateGory Index】: TB56
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