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Influence of Core Thickness and Boundary Condition on the Modal Characteristics of Composite Structure with Metallic Damping Core
Shock and Vibration ( IF 1.6 ) Pub Date : 2020-09-19 , DOI: 10.1155/2020/9720167
Fuhao Peng 1 , Yiwan Wu 1 , Hongbai Bai 1 , Yichuan Shao 1 , Zhiqiang Qin 1
Affiliation  

To reduce the vibration of the plate-like structure under different boundary conditions, an all-metal damping composite structure was proposed, and its damping layer was entangled metallic wire material (EMWM). A series of quasi-static compression tests were carried out to investigate the damping property of the EMWM layer. A modal test system was set up to evaluate whether the EMWM could dissipate vibration energy. The evaluation results showed that the displacement deviation between the baseplate and constraining plate of the structure was large enough and the EMWM could dissipate vibration energy in the form of friction. The modal characteristics of the composite structure with different core thicknesses under different boundary conditions were researched in this paper by experimental modal tests. The outcomes showed that the damping ratio of the structure would be significantly improved by adding EMWM and constraining plate. The larger the thickness of the core thickness is, the larger the damping ratio and vibration reduction performance of the composite structure are. This paper provides a new technical way for the damping design of high temperature plate structure.

中文翻译:

芯厚和边界条件对金属阻尼芯复合结构模态特性的影响

为了减小板状结构在不同边界条件下的振动,提出了一种全金属阻尼复合结构,其阻尼层为金属丝缠结材料(EMWM)。进行了一系列准静态压缩试验,以研究EMWM层的阻尼特性。建立了模态测试系统,以评估EMWM是否可以消散振动能量。评估结果表明,该结构的底板与约束板之间的位移偏差足够大,EMWM可以以摩擦的形式消散振动能量。通过实验模态试验研究了不同边界条件下不同芯厚的复合结构的模态特性。结果表明,通过增加EMWM和约束板,可以显着提高结构的阻尼比。芯厚度的厚度越大,复合结构的阻尼比和减振性能就越大。本文为高温板结构的阻尼设计提供了一种新的技术途径。
更新日期:2020-09-20
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