Investigation of acoustic target strength of a cylindrical shell partially coated with anechoic layers

MA Qi; NI Shifeng; GENG Hao; YANG Haibin

doi:10.11993/j.issn.2096-3920.2024-0105

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MA Qi, NI Shifeng, GENG Hao, YANG Haibin. Investigation of acoustic target strength of a cylindrical shell partially coated with anechoic layers[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2024-0105

Citation:

MA Qi, NI Shifeng, GENG Hao, YANG Haibin. Investigation of acoustic target strength of a cylindrical shell partially coated with anechoic layers[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2024-0105

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Investigation of acoustic target strength of a cylindrical shell partially coated with anechoic layers

doi: 10.11993/j.issn.2096-3920.2024-0105

MA Qi^1
,,
NI Shifeng^1
,,
GENG Hao^1
,,
YANG Haibin^{2, 3
,}

1.
Guangzhou Naval Representative Bureau, Kunming 650011, China
2.
College of Intelligence Science and Technology, National University of Defense Technology, Changsha, 410073, China
3.
National Key Laboratory of Equipment State Sensing and Smart Support, National University of Defense Technology, Changsha, 410073, China

Received Date: 2024-06-04
Accepted Date: 2024-08-06
Rev Recd Date: 2024-07-19

Available Online: 2025-01-22

Abstract

Abstract

In order to study the characteristics of the acoustic target strength of a cylindrical shell partially coated with anechoic layers, a dimensionality reduction method is proposed for analysis of the anechoic coating embedded with transverse cylindrical cavities, greatly reducing computational complexity. Based on the Kirchhoff-Helmholtz integral formula, the dimensionality reduction method is established through two-dimensional approximation and axial integration of differential elements of the cylinder. Using this method, the target strength reduction properties of the anechoic coating to the cylindrical shell is further analyzed. The results show that in the case of partially coated shell, the sound absorption of the anechoic coating, the coupling resonance between the coating and the shell, and the cancellation interference between the scattering waves from different regions can significantly reduce the target strength. As a consequence, the target strength reduction beyond the sound absorption effect can be achieved by regulating the coating area, which provides useful reference for the engineering applications of anechoic coatings.
- anechoic coating,
- cylindrical shell,
- acoustic target strength

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References(20)

References

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