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Design of cylindrical honeycomb sandwich meta-structures for vibration suppression
Mechanical Systems and Signal Processing ( IF 7.9 ) Pub Date : 2021-06-15 , DOI: 10.1016/j.ymssp.2021.108075
Yang Jin , Xin-Yu Jia , Qian-Qian Wu , Guo-Cai Yu , Xiao-Lei Zhang , Shuai Chen , Lin-Zhi Wu

In this study, a lightweight cylindrical honeycomb sandwich structure with low-frequency vibration attenuation ability is designed. An analytical model based on Love shell theory is established to investigate the dispersion relations of an orthotropic cylindrical shell with local resonators. The low-frequency band gaps and the presence of negative effective mass density are confirmed analytically. Subsequently, the influences of curvature and orthotropy on wave propagation behavior are discussed and the prediction formula for band gaps is defined for engineering design. To verify the feasibility of the design method, a real cylindrical honeycomb sandwich meta-structure is first designed and fabricated by introducing local resonators into a square honeycomb structure. The forced vibration response of the proposed cylindrical meta-structure is studied using both numerical simulations and experimental validation. Furthermore, a cylindrical meta-structure with a plate inside is studied numerically and experimentally, which confirms its excellent vibration suppression performance in actual applications. This study is of great significance in promoting the application of local resonance meta-structures in engineering field.



中文翻译:

抑制振动的圆柱形蜂窝夹层元结构设计

本研究设计了一种具有低频减振能力的轻质圆柱形蜂窝夹层结构。建立了基于Love壳理论的解析模型,研究了带局部谐振器的正交各向异性圆柱壳的色散关系。通过分析确认了低频带隙和负有效质量密度的存在。随后,讨论了曲率和正交各向异性对波传播行为的影响,并为工程设计定义了带隙的预测公式。为了验证设计方法的可行性,一个真正的圆柱形蜂窝夹层结构首先通过将局部谐振器引入方形蜂窝结构来设计和制造。使用数值模拟和实验验证来研究所提出的圆柱形结构的受迫振动响应。此外,对内部带有板的圆柱形结构进行了数值和实验研究,证实了其在实际应用中优异的振动抑制性​​能。该研究对促进局域共振结构在工程领域的应用具有重要意义。

更新日期:2021-06-15
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