A Prediction Method for the Damping Effect of Ring Dampers Applied to Thin-Walled Gears Based on Energy Method
1
School of Energy and Power Engineering, Beihang University, Beijing 100191, China
2
Collaborative-Innovation Center for Advanced Aero-Engine, Beijing 100191, China
3
School of Astronautics, Beihang University, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Symmetry 2018, 10(12), 677; https://doi.org/10.3390/sym10120677
Received: 16 November 2018
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Revised: 26 November 2018
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Accepted: 30 November 2018
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Published: 30 November 2018
(This article belongs to the Special Issue Symmetry in Engineering Sciences)
In turbomachinery applications, thin-walled gears are cyclic symmetric structures and often subject to dynamic meshing loading which may result in high cycle fatigue (HCF) of the thin-walled gear. To avoid HCF failure, ring dampers are designed for gears to increase damping and reduce resonance amplitude. Ring dampers are installed in the groove. They are held in contact with the groove by normal pressure generated by interference or centrifugal force. Vibration energy is attenuated (converted to heat) by frictional force on the contact interface when the relative motion between ring dampers and gears takes place. In this article, a numerical method for the prediction of friction damping in thin-walled gears with ring dampers is proposed. The nonlinear damping due to the friction is expressed as equivalent mechanical damping in the form of vibration stress dependence. This method avoids the forced response analysis of nonlinear structures, thereby significantly reducing the time required for calculation. The validity of this numerical method is examined by a comparison with literature data. The method is applied to a thin-walled gear with a ring damper and the effect of design parameters on friction damping is studied. It is shown that the rotating speed, geometric size of ring dampers and friction coefficient significantly influence the damping performance.
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Keywords:
thin-walled gear; ring damper; vibration; energy dissipation; friction damping
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MDPI and ACS Style
Wang, Y.; Ye, H.; Jiang, X.; Tian, A. A Prediction Method for the Damping Effect of Ring Dampers Applied to Thin-Walled Gears Based on Energy Method. Symmetry 2018, 10, 677. https://doi.org/10.3390/sym10120677
AMA Style
Wang Y, Ye H, Jiang X, Tian A. A Prediction Method for the Damping Effect of Ring Dampers Applied to Thin-Walled Gears Based on Energy Method. Symmetry. 2018; 10(12):677. https://doi.org/10.3390/sym10120677
Chicago/Turabian StyleWang, Yanrong, Hang Ye, Xianghua Jiang, and Aimei Tian. 2018. "A Prediction Method for the Damping Effect of Ring Dampers Applied to Thin-Walled Gears Based on Energy Method" Symmetry 10, no. 12: 677. https://doi.org/10.3390/sym10120677
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