The vibration isolation and sound radiation reduction characteristic of the micro-floating raft array skin

IF 2.2 3区工程技术 Q2 MECHANICS

Archive of Applied Mechanics Pub Date : 2024-09-03 DOI:10.1007/s00419-024-02681-8

Qiong Wu, Dan Zhao, Liqiang Dong, Jin Cui, Hong Guo, Jiang Li, Shaogang Liu

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Abstract

The control of the drag, noise, and vibration of underwater vehicles has always been a hot topic, causing the study of skin with multiple functions to become a development trend. In the present paper the vibration isolation and sound radiation reduction characteristic of a multiple functions skin, micro-floating raft array skin (MFRAS), are assessed by a mathematical model. The mathematical model is developed based on the thin plate theory and the effective medium theory and validated by the finite element model and reference. The structural parameters of MFRAS have been discussed and optimized by orthogonal experiment design with the evaluation index, the average value of the mean square velocity level. The results show that the MFRAS can isolate the vibration transmission of internal equipment by mismatched impedance between MFRAS and plate, and then reduce the sound radiation. The optimized MFRAS can reduce the mean square velocity level by 1.35 dB and the sound radiation power level by 2.47 dB within the frequency range of 10–2000 Hz compared with the equal weight free damping layer.

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微型浮筏阵列表皮的隔振和减少声辐射特性

水下航行器的阻力、噪声和振动控制一直是一个热门话题，因此对具有多种功能的蒙皮的研究成为一种发展趋势。本文通过数学模型评估了具有多种功能的蒙皮--微型浮筏阵列蒙皮（MFRAS）的隔振和减少声辐射特性。该数学模型基于薄板理论和有效介质理论建立，并通过有限元模型和参考文献进行了验证。通过正交试验设计对 MFRAS 的结构参数进行了讨论和优化，其评价指标为均方速度水平的平均值。结果表明，MFRAS 可通过 MFRAS 与板之间的不匹配阻抗隔离内部设备的振动传播，进而减少声辐射。与等重自由阻尼层相比，优化后的 MFRAS 可在 10-2000 Hz 频率范围内将均方速度级降低 1.35 dB，声辐射功率级降低 2.47 dB。

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来源期刊

Archive of Applied Mechanics 物理-力学

CiteScore

4.40

自引率

10.70%

发文量

234

审稿时长

4-8 weeks

期刊介绍： Archive of Applied Mechanics serves as a platform to communicate original research of scholarly value in all branches of theoretical and applied mechanics, i.e., in solid and fluid mechanics, dynamics and vibrations. It focuses on continuum mechanics in general, structural mechanics, biomechanics, micro- and nano-mechanics as well as hydrodynamics. In particular, the following topics are emphasised: thermodynamics of materials, material modeling, multi-physics, mechanical properties of materials, homogenisation, phase transitions, fracture and damage mechanics, vibration, wave propagation experimental mechanics as well as machine learning techniques in the context of applied mechanics.