Optimization Design of Acoustic Performance of Underwater Anechoic Coatings

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2022-07-09 DOI:10.1007/s40857-022-00267-4

Shuailong Zhou, Zhi Fang

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引用次数: 2

Abstract

Acoustic coatings with periodically arranged internal cavities have been widely applied to underwater vessels to reduce the underwater sound scattering. In this study, the simulation results from the finite element method (FEM) have been compared with the theoretical solutions based on the transfer matrix theory (TMT), and the reliability of the FEM has been verified. The Nelder-Mead algorithm has been employed to optimize the structure of the coatings and the material parameters with the sound absorption coefficient as the primary optimization objective. A function that characterizes the shape of a two-dimensional axisymmetric cavity has been proposed, and the peak value of the absorption coefficient can be successfully moved to the target frequency by changing the weighting strategy. The results show that the sound absorption coefficient of the optimized coating increases and the peak shape widens in the middle and low frequency band. The optimized axisymmetric cavity significantly improves the sound absorption performance of the anechoic coatings. The optimization algorithm of the cavity structure and material parameters proposed in this study provide an effective pathway for the optimal design of the anechoic coatings.

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水下消声涂层声学性能的优化设计

具有周期性排列内腔的声学涂层已广泛应用于水下船舶，以减少水下声散射。在本研究中，将有限元法（FEM）的模拟结果与基于传递矩阵理论（TMT）的理论解进行了比较，并验证了有限元法的可靠性。以吸声系数为主要优化目标，采用Nelder-Mead算法对涂层结构和材料参数进行了优化。提出了一种表征二维轴对称腔形状的函数，通过改变加权策略，可以成功地将吸收系数的峰值移动到目标频率。结果表明，优化后的涂层在中低频段吸声系数增大，峰值形状变宽。优化后的轴对称腔体显著提高了消声涂层的吸声性能。本研究提出的空腔结构和材料参数的优化算法为消声涂层的优化设计提供了有效途径。

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来源期刊

Acoustics Australia ACOUSTICS-

自引率

5.90%

发文量

期刊介绍： Acoustics Australia, the journal of the Australian Acoustical Society, has been publishing high quality research and technical papers in all areas of acoustics since commencement in 1972. The target audience for the journal includes both researchers and practitioners. It aims to publish papers and technical notes that are relevant to current acoustics and of interest to members of the Society. These include but are not limited to: Architectural and Building Acoustics, Environmental Noise, Underwater Acoustics, Engineering Noise and Vibration Control, Occupational Noise Management, Hearing, Musical Acoustics.