| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Acoustic Absorption Characteristics of New Underwater Omnidirectional Absorber |
| Cun Wang1, Shan-De Li1,2**, Wei-Guang Zheng2,3, Qi-Bai Huang1,2 |
1State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074
2Hubei Institute of Specialty Vehicle, Suizhou 441300
3School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004
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| Cite this article: |
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Cun Wang, Shan-De Li, Wei-Guang Zheng et al 2019 Chin. Phys. Lett. 36 044301 |
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Abstract We investigate a new underwater omnidirectional absorber with acoustic black hole effect to realize a broadband omnidirectional acoustic wave absorption. Based on multiple scattering theory, a two-dimensional axisymmetric model of underwater omnidirectional absorber comprised of an acoustic gradient refractive index structure and a hollow core is developed, and the mechanisms of omnidirectional absorption and dissipation of acoustic waves are studied. The numerical results indicate that the omnidirectional absorber developed here can achieve the omnidirectional absorption of incident acoustic waves in a broadband frequency and can effectively reduce the backscattering of acoustic waves. It potentially provides a new notion for underwater acoustic coating design.
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Received: 12 December 2018
Published: 23 March 2019
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 51575201 and 11204098. |
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