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使用增材制造的减振器增加薄壁结构的阻尼

Increasing Damping of Thin-Walled Structures Using Additively Manufactured Vibration Eliminators.

作者信息

Dunaj Paweł, Berczyński Stefan, Miądlicki Karol, Irska Izabela, Niesterowicz Beata

机构信息

Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology, Szczecin, al. Piastów 19, 70-310 Szczecin, Poland.

出版信息

Materials (Basel). 2020 May 3;13(9):2125. doi: 10.3390/ma13092125.

DOI:10.3390/ma13092125
PMID:32375286
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7254374/
Abstract

The paper presents a new way to conduct passive elimination of vibrations consisting of covering elements of structures with low dynamic stiffness with polylactide (PLA). The PLA cover was created in 3D printing technology. The PLA cover was connected with the structure by means of a press connection. Appropriate arrangement of the PLA cover allows us to significantly increase the dissipation properties of the structure. The paper presents parametric analyses of the influence of the thickness of the cover and its distribution on the increase of the dissipation properties of the structure. Both analyses were carried out using finite element models (FEM). The effectiveness of the proposed method of increasing damping and the accuracy of the developed FEM models was verified by experimental studies. As a result, it has been proven that the developed FEM model of a free-free steel beam covered with polylactide enables the mapping of resonance frequencies at a level not exceeding 0.6% of relative error. Therefore, on its basis, it is possible to determine the parameters of the PLA cover. Comparing a free-free steel beam without cover with its PLA-covered counterpart, a reduction in the amplitude levels of the receptance function was achieved by up to 90%. The solution was validated for a steel frame for which a 37% decrease in the amplitude of the receptance function was obtained.

摘要

本文提出了一种被动消除振动的新方法，该方法包括用聚乳酸（PLA）覆盖结构中动态刚度较低的元件。PLA覆盖层采用3D打印技术制作。PLA覆盖层通过压接与结构相连。PLA覆盖层的合理布置使我们能够显著提高结构的耗能特性。本文介绍了覆盖层厚度及其分布对结构耗能特性增加影响的参数分析。这两种分析均使用有限元模型（FEM）进行。通过实验研究验证了所提出的增加阻尼方法的有效性以及所开发FEM模型的准确性。结果表明，所开发的覆盖聚乳酸的自由-自由钢梁有限元模型能够在相对误差不超过0.6%的水平上映射共振频率。因此，在此基础上可以确定PLA覆盖层的参数。将无覆盖层的自由-自由钢梁与其覆盖PLA的对应钢梁进行比较，导纳函数的幅值水平降低了90%。该解决方案在一个钢框架上得到了验证，该钢框架的导纳函数幅值降低了37%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4330/7254374/7eac747903a7/materials-13-02125-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4330/7254374/c4073a8ae60b/materials-13-02125-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4330/7254374/7eac747903a7/materials-13-02125-g013.jpg

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