A Prediction Method for the Damping Effect of Ring Dampers Applied to Thin-Walled Gears Based on Energy Method

Wang, Yanrong; Ye, Hang; Jiang, Xianghua; Tian, Anmin

doi:10.3390/sym10120677

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…Both the gear rim and the damping ring are equivalent to a circular ring, and the radial vibration causes them to bend and deform under the action of the bending moment M [8]. Thus, at the contact surface, a bending strain difference will occur, namely…”

Section: Friction Energy Dissipation Mechanism Of Damping Ringmentioning

confidence: 99%

Design theory and method of damping rings attached to aviation gears with high speed

Wei

et al. 2022

J. Phys.: Conf. Ser.

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Gears, having thin rim and disk, are widely used in aviation transmission systems, while the traveling wave resonance is easily induced due to the high speed and wide working range. Although attaching damping rings to these gears is an effective solution, the current research lacks the in-depth comparison and specific design methods of various damping rings. Thus, this paper systematically analyses the design theory and method of attaching damping rings to the aviation gear. A system is established to determine the design operating points of the additional damping ring. Various damping ring design schemes are compared from multiple aspects and the friction energy dissipation mechanism is analysed. The design method for the damping ring structure parameters is put forward.

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Section: Friction Energy Dissipation Mechanism Of Damping Ringmentioning

confidence: 99%

Design theory and method of damping rings attached to aviation gears with high speed

Wei

et al. 2022

J. Phys.: Conf. Ser.

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“…Another well-known work [3] proposed a numerical method for predicting damping in gears with ring dampers. The nonlinear damping when friction is taken into account is expressed as equivalent mechanical damping as a function of vibration stress.…”

Section: Introductionmentioning

confidence: 99%

Method of an Asymptotic Analysis of the Nonlinear Monotonic Stability of the Oscillation at the Problem of Damping of the Angle of Attack of a Symmetric Spacecraft

Lyubimov

2022

Symmetry

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One of the current directions in the development of the modern theory of oscillations is the elaboration of effective methods for analyzing the stability of solutions of dynamical systems. The aim of the work is to develop a new asymptotic method for studying the nonlinear monotonic stability of the amplitude of plane oscillations in a dynamic system of equations with one fast phase. The method is based on the use of the method of variation of an arbitrary constant, the averaging method, and the classical method of mathematical research of the function of one independent variable. It is assumed that the resulting approximate analytical function is defined and twice continuously differentiable on the entire considered interval of change of the independent variable. It describes the nonlinear and monotonic evolution of the oscillation amplitude on the entire considered interval of change of the independent variable. In the paper, this method is applied to the problem of nonlinear monotonic aerodynamic damping of the amplitude of oscillations of the angle of attack during the descent of a symmetric spacecraft in the atmosphere of Mars. The method presented in this paper made it possible to find all characteristic cases of nonlinear monotonic stability and instability of the oscillation amplitude of the angle of attack. In addition, one should speak of a symmetrical quantity of different cases of stability and instability, located on different sides of the zero value of the first average derivative of the angle of attack.

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“…The latter is located in the groove of the integrally blisk and is held against the disk by centrifugal forces. Similar frictional ring dampers are known as efficient dampers in other rotating structures such as labyrinth seals [7] and gears [8,9]. The dynamic analysis of the frictional ring damper for integrally blisk has been exploited by many researchers.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Modal Analysis of Frictional Ring Damper for Compressor Blisk

Sun

Yuan

Denimal

et al. 2021

Journal of Engineering for Gas Turbines and Power

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The use of integrally blisk is becoming popular because of the advantages in aerodynamic efficiency and mass reduction. However, in an integrally blisk, the lack of the contact interface leads to a low structural damping compared to an assembled bladed-disk. One emerging damping technique for the integrally blisk is based on the use of friction ring damper which exploits the contact interfaces at the underneath of the disk. In this paper, three different geometries of the ring dampers are investigated for damping enhancement of a blisk. A full-scale compressor blisk is considered as a case study where a node to node con- tact model is used to compute the contact forces. The dynamic behaviour of the blisk with the ring damper is investigated by using nonlinear modal analysis which allows a direct estimation of the damping generated by the friction interface. The damping performance for the different ring dampers are evaluated and compared. It appears that the damping efficiency as well as the shift in the resonant frequency for the different geometries are highly related to the nodal diameter and contact pressure/gap distributed within contact interface. The geometry of the ring damper has significant impact on the damping performance.

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A Prediction Method for the Damping Effect of Ring Dampers Applied to Thin-Walled Gears Based on Energy Method

Cited by 11 publications

References 32 publications

Design theory and method of damping rings attached to aviation gears with high speed

Design theory and method of damping rings attached to aviation gears with high speed

Method of an Asymptotic Analysis of the Nonlinear Monotonic Stability of the Oscillation at the Problem of Damping of the Angle of Attack of a Symmetric Spacecraft

Nonlinear Modal Analysis of Frictional Ring Damper for Compressor Blisk

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