Investigation of Acoustic Target Strength of a Cylindrical Shell Partially Covered with Anechoic Coating

MA Qi; NI Shifeng; GENG Hao; YANG Haibin

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

Volume 33 Issue 1

Mar 2025

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Article Navigation > Journal of Unmanned Undersea Systems > 2025 > 33(1): 150-155

MA Qi, NI Shifeng, GENG Hao, YANG Haibin. Investigation of Acoustic Target Strength of a Cylindrical Shell Partially Covered with Anechoic Coating[J]. Journal of Unmanned Undersea Systems, 2025, 33(1): 150-155. 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 Covered with Anechoic Coating[J]. Journal of Unmanned Undersea Systems, 2025, 33(1): 150-155. doi: 10.11993/j.issn.2096-3920.2024-0105

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Investigation of Acoustic Target Strength of a Cylindrical Shell Partially Covered with Anechoic Coating

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

The primary structural configuration of underwater equipment consists of cylindrical shells. To study the characteristics of the acoustic target strength(TS) of a cylindrical shell partially covered with anechoic coatings, an anechoic coating with an embedded transverse cylindrical cavity was selected for analysis. Based on the Kirchhoff-Helmholtz integral formula, a dimensionality reduction method for acoustic TS of a cylindrical shell partially covered with anechoic coating was established through two-dimensional cylindrical differential element approximation and axial integration with significantly reduced computational complexity. By using this method, the control pattern of the anechoic coating on the acoustic TS of the cylindrical shell was further analyzed. The results show that in the case of a partially coated shell, the acoustic TS can be significantly reduced due to effects such as the sound absorption by the anechoic coating, the coupling resonance between the coating and the shell, and the destructive interference of scattering waves from different regions. Furthermore, optimizing the coated area can enhance the control of acoustic TS, beyond just sound absorption, providing useful references for the engineering design and applications of anechoic coatings.
- anechoic coating,
- cylindrical shell,
- acoustic target strength

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References(20)

References

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