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논문 기본 정보

자료유형
학술저널
저자정보
Dawoon Lee (Korea Marine and Ocean University) Ho Seuk Bae (Agency for Defense Development) Woo-Shik Kim (Agency for Defense Development) Wookeen Chung (Korea Maritime and Ocean University)
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제44권 제3호
발행연도
2020.6
수록면
266 - 273 (8page)
DOI
10.5916/jamet.2020.44.3.266

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초록· 키워드

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In the underwater environment, waves undergo complex propagation due to complicated sound velocity structures and various environmental variables. The signal recorded in the underwater environment includes the coherence signal by the multipath, such as the direct wave, surface- and bottom-reflected waves, and refracted wave according to the sound velocity structure. Analyzing the accurate multipath coherence signal is one of the important factors for identifying targets underwater. This requires wave propagation modeling. In this study, a coherence transmission loss model is generated by solving the three-dimensional acoustic wave equation by the finite difference method, which is one of the methods to more accurately simulate wave propagation in the underwater acoustic environment. The generated coherence transmission loss model is compared and analyzed using the BELLHOP model provided by the U.S. Office of Naval Research. The coherence transmission loss model based on the wave equation has limitations in terms of its computer memory requirements and computational cost. However, by presenting a method to implement a coherence transmission loss model for a source with complex frequency characteristics, if computer technology develops sufficiently, the range of utilization of this method is expected to increase.

목차

Abstract
1. Introduction
2. Transmission Loss Model
3. Comparison of Transmission Loss Models
4. Conclusion
References

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