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2019 Volume 35 Issue 4
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Cun Wang, Shan-De Li, Wei-Guang Zheng, Qi-Bai Huang. 2019: Acoustic Absorption Characteristics of New Underwater Omnidirectional Absorber, Chinese Physics Letters, 36(4): 39-42. doi: 10.1088/0256-307X/36/4/044301
Citation: Cun Wang, Shan-De Li, Wei-Guang Zheng, Qi-Bai Huang. 2019: Acoustic Absorption Characteristics of New Underwater Omnidirectional Absorber, Chinese Physics Letters, 36(4): 39-42. doi: 10.1088/0256-307X/36/4/044301
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Acoustic Absorption Characteristics of New Underwater Omnidirectional Absorber

  • State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074

  • State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074;Hubei Institute of Specialty Vehicle, Suizhou 441300

  • Hubei Institute of Specialty Vehicle, Suizhou 441300;School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004

  • Fund Project: the National Natural Science Foundation of China under Grant Nos 51575201 and 11204098
  • We investigate a new underwater omidirectional 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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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Acoustic Absorption Characteristics of New Underwater Omnidirectional Absorber

Abstract: We investigate a new underwater omidirectional 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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