Finite Element Analysis on Acoustic and Mechanical Performance of Flexible Perforated Honeycomb-Corrugation Hybrid Sandwich Panel
Finite Element Analysis on Acoustic and Mechanical Performance of Flexible Perforated Honeycomb-Corrugation Hybrid Sandwich Panel
复制标题
柔性穿孔蜂窝波纹混合夹芯板声学和力学性能有限元分析
DOI：
10.1155/2021/9977644
复制
发表时间：
2021-05-17
影响因子：
1.6
通讯作者：
Chen, Yun
中科院分区：
文献类型：
--
作者：
Hu, Jiaming;Wang, Junyi;Chen, Yun
多孔蜂窝夹芯板自提出以来，由于其在低频下具有上级宽带吸声性能和优异的机械刚度/强度，引起了人们的广泛关注。然而，大多数现有的研究都假设了一个高强度材料制成的结构，并研究其性能的基础上的理想刚性壁模型很少考虑声学-结构的相互作用，从而忽略了由材料的弹性引起的结构振动。在本文中，我们开发了一个更现实的模型，考虑固体结构动力学使用有限元法（FEM）和应用铝和橡胶作为结构材料。低频性能的增强和宽带吸收的抑制在低强度橡胶中共存，这意味着在选择杨氏模量以平衡这两种影响中的折衷。通过对热粘性耗散、机械能和平均结构应力的分析，得出了结构应在低于谐振频率时工作的结论。基于这些发现，我们设计了一种新型的铝橡胶复合材料结构，具有增强的低频吸收，高剪切载荷，法向压缩和热膨胀的阻力。我们的研究有望为噪声控制和多功能声学超材料的设计提供一些启示。
Since proposed, the perforated honeycomb-corrugation sandwich panel has attracted a lot of attention due to its superior broadband sound absorption at low frequencies and excellent mechanical stiffness/strength. However, most existing studies have assumed a structure made of high-strength materials and studied its performance based on the ideal rigid-wall model with little consideration for acoustic-structure interaction, thereby neglecting the structural vibrations caused by the material’s elasticity. In this paper, we developed a more realistic model considering the solid structural dynamics using the finite element method (FEM) and by applying aluminum and rubber as the structural material. The enhancement of the low-frequency performance and inhibition of broadband absorption coexisted in low-strength rubbers, implying a compromise in the selection of Young's modulus to balance these two influences. Further analysis on thermal-viscous dissipation, mechanical energy, and average structural stress indicated that the structure should work right below the resonant frequency for optimization. Based on these findings, we designed a novel aluminum-rubber composite structure possessing enhanced low-frequency absorption, high resistance to shear load, normal compression, and thermal expansion. Our research is expected to shed some light on noise control and the design of multifunctional acoustic metamaterials.