Underwater Vibro-acoustic Coupling Characteristics of a Simply Supported Plate Coupled with a Quasi-Zero Stiffness Vibration Isolation

TANG Jiajing; ZOU Shaohua; WANG Qiang; ZHOU Jiaxi

doi:10.11993/j.issn.2096-3920.2026-0018

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TANG Jiajing, ZOU Shaohua, WANG Qiang, ZHOU Jiaxi. Underwater Vibro-acoustic Coupling Characteristics of a Simply Supported Plate Coupled with a Quasi-Zero Stiffness Vibration Isolation[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0018

Citation:

TANG Jiajing, ZOU Shaohua, WANG Qiang, ZHOU Jiaxi. Underwater Vibro-acoustic Coupling Characteristics of a Simply Supported Plate Coupled with a Quasi-Zero Stiffness Vibration Isolation[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0018

Citation:

TANG Jiajing, ZOU Shaohua, WANG Qiang, ZHOU Jiaxi. Underwater Vibro-acoustic Coupling Characteristics of a Simply Supported Plate Coupled with a Quasi-Zero Stiffness Vibration Isolation[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0018

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Underwater Vibro-acoustic Coupling Characteristics of a Simply Supported Plate Coupled with a Quasi-Zero Stiffness Vibration Isolation

doi: 10.11993/j.issn.2096-3920.2026-0018

TANG Jiajing^1
,,
ZOU Shaohua^1
,,
WANG Qiang^2
,,
ZHOU Jiaxi^{1
,
,}

1.
College of Mechanical and Transportation Engineering, Hunan University, Changsha, Hunan 410082
2.
School of Intelligent Engineering and Intelligent Manufacturing, Hunan University of Technology and Business, Changsha, Hunan 410205

Received Date: 2026-01-18
Accepted Date: 2026-03-04
Rev Recd Date: 2026-02-25

Available Online: 2026-03-25

Abstract

Abstract

Structural vibration noise from the power compartment critically impairs the acoustic stealth performance of underwater vehicles. Utilizing vibration isolation technology to attenuate or isolate vibration transmission is an effective approach to reduce structural vibration noise. However, traditional linear vibration isolation technology struggles to achieve low-frequency vibration and noise reduction. To address this challenge, this paper proposes applying a Quasi-Zero-Stiffness (QZS) isolation method between the excitation source and the elastic structure to reduce the transmission of equipment vibration, thereby mitigating the vibration and radiated noise of underwater structures. Taking a QZS isolator coupled with a simply supported plate as the research object, the vibro-acoustic coupling equations are established and solved by considering the radiation acoustic impedance matrix with mutual coupling effects. Subsequently, the accuracy of the theoretical model is validated through finite element simulations. The results indicate that, compared to the linear isolation system, the QZS isolation system significantly reduces the initial isolation frequency and enhances low-frequency isolation efficiency. Furthermore, the introduction of QZS shifts the system's resonance frequency far below the high-radiation-efficiency volumetric control modes of the simply supported plate. This frequency mismatch mechanism effectively blocks the conversion of vibration energy into radiated acoustic energy at the source, reducing the radiated sound power by 15 dB across the entire frequency band above 10.6 Hz. This study resolves the issue of low-frequency vibration and noise reduction in underwater structures, providing a solid theoretical reference for the acoustic stealth design of power compartments in underwater vehicles.
- quasi-zero-stiffness,
- low-frequency vibration reduction,
- vibration-acoustic coupling,
- acoustic radiation,
- low-frequency noise reduction

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References(23)

References

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