Modeling and Experimental Research of Constrained Damping Structure Considering Frequency-Dependent Characteristics

被引：0
|
作者：
Luo Z. [1 ,2 ]
Guo S.-W. [1 ,2 ]
Yu C.-S. [1 ,2 ]
He F.-X. [1 ,2 ]
机构：
[1] School of Mechanical Engineering & Automation, Northeastern University, Shenyang
[2] Key Laboratory of Vibration and Control of Aero-Propulsion Systems, Ministry of Education, Northeastern University, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2021年 / 42卷 / 07期
关键词：
Constrained damping structure; Finite element model; Frequency-dependent characteristics; Least squares method; Viscoelastic material;
D O I：
10.12068/j.issn.1005-3026.2021.07.009
中图分类号：
学科分类号：
摘要：
In order to improve the simulation accuracy of viscoelastic constrained damping structure model, a modeling method of constrained damping structure considering frequency-dependent characteristics was proposed and then a test was performed for verification. Firstly, the dynamic test of ZN-3 viscoelastic material was carried out, and the expressions of modulus and loss factor of viscoelastic material were obtained using the least squares method. Secondly, according to the expression of loss factor of ZN-3 viscoelastic material, the natural frequency and modal loss factor of constrained damping structure were solved using the modified modal strain energy method considering frequency-dependent characteristics. Finally, the cantilever constrained damping structure attaching the viscoelastic damping material was chosen and verified from both theory and test, whose results showed that the finite element model considering frequency-dependent characteristics has higher accuracy and the error of model to test is within 5%, which verifies the accuracy of the modeling method. © 2021, Editorial Department of Journal of Northeastern University. All right reserved.
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页码：966 / 971and979
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