An air cavity method for increasing the underwater acoustic targets strength of corner reflector
In order to improve the underwater acoustic target strength of corner reflectors, according to the principle of acoustic impedance mismatch of the boundary layer, the method of using air cavity to increase the underwater acoustic target strength of corner reflectors is proposed. The acoustic reflect...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2020-04-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914719305033 |
| _version_ | 1818642340506501120 |
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| author | Yi Luo Xin Chen Da-wei Xiao Wu-di Wen Tao-tao Xie |
| author_facet | Yi Luo Xin Chen Da-wei Xiao Wu-di Wen Tao-tao Xie |
| author_sort | Yi Luo |
| collection | DOAJ |
| description | In order to improve the underwater acoustic target strength of corner reflectors, according to the principle of acoustic impedance mismatch of the boundary layer, the method of using air cavity to increase the underwater acoustic target strength of corner reflectors is proposed. The acoustic reflection coefficients of underwater air layer and single layer metal sheet are calculated and compared. The results show that the reflection coefficient of single layer metal sheet is greatly affected by frequency and incidence angle, and the reflection coefficient of air layer in water is large and little affected by frequency and incidence angle. On this basis, a new kind of airfilled cavity corner reflector is designed. The acoustic scattering characteristics of underwater airfilled cavity corner reflector are calculated cumulatively, and the results are compared with the monolayer metal sheet corner reflector. The simulation results show that the acoustic reflection effect of the airfilled cavity corner reflector is better. In order to verify the correctness of the method, the test was carried out in the silencing tank. The experimental results show that the simulation results are in good agreement with the experimental results, and the airfilled cavity can improve on acoustic reflection performance of the underwater corner reflector. |
| first_indexed | 2024-12-16T23:41:30Z |
| format | Article |
| id | doaj.art-41d0612401de4efab76d2ffeea30736b |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-12-16T23:41:30Z |
| publishDate | 2020-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-41d0612401de4efab76d2ffeea30736b2022-12-21T22:11:35ZengKeAi Communications Co., Ltd.Defence Technology2214-91472020-04-01162493501An air cavity method for increasing the underwater acoustic targets strength of corner reflectorYi Luo0Xin Chen1Da-wei Xiao2Wu-di Wen3Tao-tao Xie4Corresponding author.; Dept. of Weaponry Eng, Naval University of Engineering, Wuhan 430033, ChinaDept. of Weaponry Eng, Naval University of Engineering, Wuhan 430033, ChinaDept. of Weaponry Eng, Naval University of Engineering, Wuhan 430033, ChinaDept. of Weaponry Eng, Naval University of Engineering, Wuhan 430033, ChinaDept. of Weaponry Eng, Naval University of Engineering, Wuhan 430033, ChinaIn order to improve the underwater acoustic target strength of corner reflectors, according to the principle of acoustic impedance mismatch of the boundary layer, the method of using air cavity to increase the underwater acoustic target strength of corner reflectors is proposed. The acoustic reflection coefficients of underwater air layer and single layer metal sheet are calculated and compared. The results show that the reflection coefficient of single layer metal sheet is greatly affected by frequency and incidence angle, and the reflection coefficient of air layer in water is large and little affected by frequency and incidence angle. On this basis, a new kind of airfilled cavity corner reflector is designed. The acoustic scattering characteristics of underwater airfilled cavity corner reflector are calculated cumulatively, and the results are compared with the monolayer metal sheet corner reflector. The simulation results show that the acoustic reflection effect of the airfilled cavity corner reflector is better. In order to verify the correctness of the method, the test was carried out in the silencing tank. The experimental results show that the simulation results are in good agreement with the experimental results, and the airfilled cavity can improve on acoustic reflection performance of the underwater corner reflector.http://www.sciencedirect.com/science/article/pii/S2214914719305033Underwater corner reflectorAcoustic target strengthAir cavityAcoustic impedance mismatch |
| spellingShingle | Yi Luo Xin Chen Da-wei Xiao Wu-di Wen Tao-tao Xie An air cavity method for increasing the underwater acoustic targets strength of corner reflector Defence Technology Underwater corner reflector Acoustic target strength Air cavity Acoustic impedance mismatch |
| title | An air cavity method for increasing the underwater acoustic targets strength of corner reflector |
| title_full | An air cavity method for increasing the underwater acoustic targets strength of corner reflector |
| title_fullStr | An air cavity method for increasing the underwater acoustic targets strength of corner reflector |
| title_full_unstemmed | An air cavity method for increasing the underwater acoustic targets strength of corner reflector |
| title_short | An air cavity method for increasing the underwater acoustic targets strength of corner reflector |
| title_sort | air cavity method for increasing the underwater acoustic targets strength of corner reflector |
| topic | Underwater corner reflector Acoustic target strength Air cavity Acoustic impedance mismatch |
| url | http://www.sciencedirect.com/science/article/pii/S2214914719305033 |
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