Effect of Three-Dimensional auxetic honeycomb core on behavior of sound transmission loss in shallow sandwich cylindrical shell

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2024-10-16 DOI:10.1016/j.compstruct.2024.118624

Mojtaba Sayad Ghanbari Nezhad , Mehrdad Motavasselolhagh , Roohollah Talebitooti , Fengxian XIN

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引用次数: 0

Abstract

The primary objective of this research is to examine the sound transmission loss (STL) in a shallow sandwich cylindrical shell featuring a 3D auxetic honeycomb core. Initially, the 3D elasticity theory was employed by applying the state vector method and extracting both local and global transfer matrices to calculate STL relations for the cylindrical shell, including the auxetic honeycomb core. Subsequently, boundary conditions were applied to calculate the unknowns, eventually leading to a relationship for calculating STL within the structure. The derived equations were numerically solved using MATLAB software. The validity of the results obtained using this method was examined by comparing them with the findings of other researchers. Moreover, a comparison was conducted involving a large ratio of the curvature radius to thickness, considering both the auxetic honeycomb core and aluminum with equal mass. The results demonstrate a significant increase in STL when utilizing this auxetic honeycomb core compared to a material with the same mass. Specifically, at a frequency of 2 Hz, a significant enhancement of about 29.44 % in STL is observed when increasing the core thickness from 10.39 mm to 20.39 mm. Furthermore, STL results have been obtained for various thicknesses, radius of curvature, and incident angles.

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三维辅助蜂窝芯对浅层夹层圆柱壳传声损耗行为的影响

本研究的主要目的是研究具有三维辅助蜂窝芯的浅夹层圆柱形壳体的传声损耗（STL）。首先，采用三维弹性理论，应用状态矢量法，提取局部和全局传递矩阵，计算包括辅助蜂窝芯在内的圆柱形壳体的 STL 关系。随后，应用边界条件计算未知数，最终得出计算结构内 STL 的关系。推导出的方程使用 MATLAB 软件进行数值求解。通过与其他研究人员的研究结果进行比较，检验了使用这种方法得出的结果的有效性。此外，还对曲率半径与厚度之比较大的情况进行了比较，同时考虑到辅助蜂窝芯和铝的质量相等。结果表明，与相同质量的材料相比，使用这种辅助蜂窝芯时，STL 有明显增加。具体地说，在频率为 2 Hz 时，当内核厚度从 10.39 毫米增加到 20.39 毫米时，STL 显著增加了约 29.44%。此外，还获得了不同厚度、曲率半径和入射角的 STL 结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.