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Open AccessArticle

An Equivalent Damping Numerical Prediction Method for the Ring Damper Used in Gears Under Axial Vibration

by Shuai Wang 1,2,*, Xiaolei Wang 1,*, Yanrong Wang 3 and Hang Ye 3
1
National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China
3
School of Energy and Power Engineering, Beihang University, Beijing 100191, China
*
Authors to whom correspondence should be addressed.
Symmetry 2019, 11(12), 1469; https://doi.org/10.3390/sym11121469
Received: 7 November 2019 / Revised: 26 November 2019 / Accepted: 29 November 2019 / Published: 2 December 2019
(This article belongs to the Special Issue Symmetry in Engineering Sciences II)
In aircraft gas turbine engines, gears in the transmission system are typically cyclic in structure and inevitably encounter large dynamic loads, such as meshing excitation, resulting in high vibration loads in resonance. To prevent gear resonance failure, a ring damper is employed to reduce the resonance response. As relative motion between the gear and the ring damper occurs, vibration loads can be reduced by friction energy dissipation. Moreover, the gears in the aircraft engine are thin-walled and their axial stiffness is much smaller than radial stiffness; thus, it is easier for axial vibration to cause resonance failure. This paper proposes an equivalent damping numerical prediction method for a ring damper under axial vibration, which greatly shortens the calculation time and prevents the forced response analysis of nonlinear structures. Via this method, the influence of ring damper structural parameters on friction damping in gears under axial vibration is investigated. The results indicate that the friction coefficient and mass of the ring damper have a great influence on damping performance.
Keywords: gear; ring damper; energy dissipation; axial vibration; friction damping gear; ring damper; energy dissipation; axial vibration; friction damping
MDPI and ACS Style

Wang, S.; Wang, X.; Wang, Y.; Ye, H. An Equivalent Damping Numerical Prediction Method for the Ring Damper Used in Gears Under Axial Vibration. Symmetry 2019, 11, 1469.

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