Numerical study of flow-induced noise response of lightweight composite sandwich sail based on the boundary element method

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY Engineering Analysis with Boundary Elements Pub Date : 2024-12-05 DOI:10.1016/j.enganabound.2024.106059

Peng Yin, Xu-Chang Liu, Jin-Shui Yang, Yao-Yao Xu, Shuang Li, Xiao-Bin Lu, Lin-Zhi Wu

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Abstract

The submarine's sail, as the largest appendage structure, is more susceptible to turbulence induced vibrations during medium to high-speed navigation, making it a critical area for the generation of flow-induced noise, significantly impacting the stealth and safety of submarine. Considering the excellent mechanical properties and high damping characteristics of lightweight composite sandwich structures, by combining large eddy simulation with vibro-acoustic coupling methods based on boundary element method, under the premise of verifying the accuracy of the numerical methods, a series of three-dimensional dynamic numerical models are established to investigate the flow-induced noise response of the novel composite sandwich sail. The results indicate that the overall sound power level of composite sandwich sail is reduced by approximately 8.9 dB compared to steel structure. The maximum sound power level of composite sandwich sail is lower than the steel with equal areal density. The sound pressure of the sail with buoyant material is lower than that of foam and PVC with the same damping. This work can provide theoretical support for the design methods of new lightweight, multifunctional sail structures.

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基于边界元法的轻质复合材料夹层帆流致噪声响应数值研究

潜艇的船帆作为最大的附属物结构，在中高速航行中更容易受到湍流振动的影响，是流致噪声产生的关键区域，严重影响潜艇的隐身性和安全性。考虑到轻质复合材料夹层结构优异的力学性能和高阻尼特性，将基于边界元法的大涡模拟与振声耦合方法相结合，在验证数值方法准确性的前提下，建立了一系列三维动力数值模型，研究了新型复合材料夹层帆的流致噪声响应。结果表明，复合材料夹层帆的整体声功率比钢结构降低了约8.9 dB。复合材料夹层帆的最大声功率级低于等面密度的钢。在相同阻尼条件下，采用浮力材料的风帆的声压要低于泡沫材料和聚氯乙烯材料。该工作可为新型轻量化、多功能风帆结构的设计方法提供理论支持。

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来源期刊

Engineering Analysis with Boundary Elements 工程技术-工程：综合

CiteScore

5.50

自引率

18.20%

发文量

368

审稿时长

56 days

期刊介绍： This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods. Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness. The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields. In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research. The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods Fields Covered: • Boundary Element Methods (BEM) • Mesh Reduction Methods (MRM) • Meshless Methods • Integral Equations • Applications of BEM/MRM in Engineering • Numerical Methods related to BEM/MRM • Computational Techniques • Combination of Different Methods • Advanced Formulations.