Characteristics of Low-Frequency Acoustic Wave Propagation in Ice-Covered Shallow Water Environment
| Autor: | Zhifu Zhang, Wen Jian, Shande Li, Shuai Yuan, Shaowei Liu, Qibai Huang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Sound transmission class QH301-705.5 Acoustics QC1-999 Low frequency Physics::Geophysics elastic parabolic equation Normal mode General Materials Science Underwater Biology (General) Instrumentation QD1-999 Fluid Flow and Transfer Processes polar shallow water environment Process Chemistry and Technology Physics General Engineering Submarine Engineering (General). Civil engineering (General) Seafloor spreading Computer Science Applications Waves and shallow water Chemistry Polar TA1-2040 low frequency Geology |
| Zdroj: | Applied Sciences Volume 11 Issue 17 Applied Sciences, Vol 11, Iss 7815, p 7815 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11177815 |
| Popis: | Mastering the sound propagation law of low-frequency signals in the Arctic is a major frontier basic research demand to improve the level of detection, communication, and navigation technology. It is of practical significance for long-distance sound propagation and underwater target detection in the Arctic Ocean. Therefore, how to establish an effective model to study the characteristics of the acoustic field in the Arctic area has always been a hot topic in polar acoustic research. Aimed at solving this problem, a mathematical polar acoustic field model with an elastic seafloor is developed based on a range-dependent elastic parabolic equation theory. Moreover, this method is applied to study the characteristics of polar sound propagation for the first attempt. The validity and effectiveness of the method and model are verified by the elastic normal mode method. Simultaneously, the propagation characteristics of low-frequency signals are studied in a polar sound field from three aspects, which are seafloor parameters, sea depth, and ice thickness. The results show that the elastic parabolic equation method can be well utilized to the Arctic low-frequency acoustic field. The analysis of the influence factors of the polar sound field reveals the laws of sound transmission loss of low-frequency signals, which is of great significance to provide information prediction for underwater submarine target detection and target recognition. |
| Databáze: | OpenAIRE |
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