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This article is cited in 1 scientific paper (total in 1 paper)
MECHANICS
Analysis of amplitude-dependent damping and its application in numerical calculations
O. I. Kazakovaab, I. Yu. Smolincb, I. M. Bezmozgiyba a S.P. Korolev Rocket and Space Corporation «Energia», Korolev,
Russian Federation
b Tomsk State University, Tomsk, Russian Federation
c Institute of Strength Physics and Materials Science SB RAS (ISPMS),
Tomsk, Russian Federation
Abstract:
Digital twins are becoming an essential part of the product designing. In the rocket and space technology, a dynamic finite element model represents the important component of the digital twin. This model is required to be capable of predicting behavior of the structure under dynamic load with a reliable accuracy. At the same time, calculations of the design response with allowance for amplitude-dependent damping are impossible by the modern finite element software.
This article presents the test results of flat aluminum alloy samples which are the time characteristics of free damped oscillations and amplitude-frequency characteristics of forced oscillations of samples. An analysis of test results was carried out using the existing methods for obtaining dependences of the dumping on the equivalent (von Mises) stress in the material.
The paper describes a damping matrix formation for numerical calculations using constant damping coefficients. Also, the article proposes an iterative algorithm, which enables the application of amplitude-dependent damping coefficients in the harmonic analysis.
Keywords:
vibration, stress state, amplitude-dependent damping, finite element modeling.
Received: 01.06.2018
Citation:
O. I. Kazakova, I. Yu. Smolin, I. M. Bezmozgiy, “Analysis of amplitude-dependent damping and its application in numerical calculations”, Vestn. Tomsk. Gos. Univ. Mat. Mekh., 2018, no. 54, 66–78
Linking options:
https://www.mathnet.ru/eng/vtgu661 https://www.mathnet.ru/eng/vtgu/y2018/i54/p66
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Abstract page: | 207 | Full-text PDF : | 393 | References: | 17 |
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