Low frequency vibration reduction of CFRP raft frame based on local resonance

Marine Structures, Год журнала: 2025, Номер 103, С. 103851 - 103851

Опубликована: Май 22, 2025

Язык: Английский

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Efficient model updating of shaft-raft-hull system using multi-stage convolutional neural network combined with sensitivity analysis

Ocean Engineering, Год журнала: 2024, Номер 312, С. 119041 - 119041

Опубликована: Авг. 23, 2024

Язык: Английский

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The underwater acoustic scattering characteristics of cylindrical shells: Effect of a coating made of micro floating raft arrays

Journal of Sandwich Structures & Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 26, 2024

Coatings play a crucial role in the speed and stealth performance of underwater vehicles. While cylindrical shell as an important component hull, studying acoustic scattering characteristics with coatings is indispensable work. A novel anechoic coating designed by introducing floating raft mechanism to reduce This paper comprehensively investigates characteristic using finite element method coupled boundary (FEM + BEM), particularly exploring effect made micro arrays. The results indicate that can effectively absorb detection sound waves peaks target echoes, due dissipation energy element. Moreover, surface displacement exhibit obvious attenuation. From perspective effect, mean strength average 7.17 dB (56% reduction active sonar distance) case monostatic detection. Even for multistatic which jointly receive echo, still reduces distance 28%. Notably, performs better than homogenous layer, but its mass only about half one. In general, great significance lightweight design coatings.

Язык: Английский

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Multi-mode vibration suppression of a floating raft system via a tristable nonlinear energy sink

Ocean Engineering, Год журнала: 2024, Номер 318, С. 120159 - 120159

Опубликована: Дек. 27, 2024

Язык: Английский

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