Study on Flow-Induced Vibration and Acoustic Radiation Characteristics of LUUV with Internal Frame-Stiffened Thin-Shell Wet Compartments

ZHANG Xuan; ZHU Min; DUAN Hao; ZHANG Ming; HE Zhirong; YANG Zhuangtao

doi:10.11993/j.issn.2096-3920.2026-0155

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ZHANG Xuan, ZHU Min, DUAN Hao, ZHANG Ming, HE Zhirong, YANG Zhuangtao. Study on Flow-Induced Vibration and Acoustic Radiation Characteristics of LUUV with Internal Frame-Stiffened Thin-Shell Wet Compartments[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0155

Citation:

ZHANG Xuan, ZHU Min, DUAN Hao, ZHANG Ming, HE Zhirong, YANG Zhuangtao. Study on Flow-Induced Vibration and Acoustic Radiation Characteristics of LUUV with Internal Frame-Stiffened Thin-Shell Wet Compartments[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0155

Citation:

ZHANG Xuan, ZHU Min, DUAN Hao, ZHANG Ming, HE Zhirong, YANG Zhuangtao. Study on Flow-Induced Vibration and Acoustic Radiation Characteristics of LUUV with Internal Frame-Stiffened Thin-Shell Wet Compartments[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0155

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Study on Flow-Induced Vibration and Acoustic Radiation Characteristics of LUUV with Internal Frame-Stiffened Thin-Shell Wet Compartments

doi: 10.11993/j.issn.2096-3920.2026-0155

Xi’an Precision Machinery Research Institute, Kunming 650106, China

Received Date: 2026-09-11
Accepted Date: 2026-10-26
Rev Recd Date: 2026-10-21

Available Online: 2026-11-13

Abstract

Abstract

Large unmanned underwater vehicle(LUUV) are receiving increasing attention and often use wet compartments with thin, frame-stiffened shells. During navigation, fluctuating wall pressure excites shell vibration and generates energetic, slowly attenuating radiated noise. To support noise control, this study combines improved delayed detached-eddy simulation(IDDES) and finite element/automatic matching layer(FEM/AML) to analyze flow-induced vibration and sound radiation up to 1 kHz. Results indicate that wall pressure fluctuation energy concentrates in the low-frequency range. Due to bilateral added water mass, low-frequency vibration primarily manifests as local compartment modes. Overall radiated sound power increases with speed. Increasing wet-compartment shell thickness suppresses some low-frequency vibration but only slightly reduces the overall radiated sound power level, possibly owing to added-mass effects from two-sided water loading. Compared with the metallic shells considered, the low-density carbon-fiber shell exhibits the higher mean-square vibration and radiated sound power. These findings clarify the effects of speed, shell thickness, and material on LUUV noise and inform acoustic stealth design.
- large unmanned undersea vehicle,
- thin-shell,
- turbulent pressure fluctuations,
- flow-induced vibration,
- acoustic radiation characteristic

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References(17)

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