High-frequency disturbance force suppression mechanism of a flywheel equipped with a flexible dynamic vibration absorber

Huang, Xiuchang; Su, Zhen; Wang, Sen; Wei, Xinsheng; Yong, Wang; Hu, Hua

doi:10.1177/1077546320915340

Cited by 10 publications

(8 citation statements)

References 16 publications

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“…As shown in Figure 1, the characteristic mode of the flywheel obtained from the finite element model is an umbrella-shaped flapping mode, which is dominated by the axial movement of the wheel body and the bearing resting on the disc spring [1]. The flapping mode is the main contributor to the axial force acting on the bearing owing to a unit force applied at the rim of the flywheel.…”

Section: Dynamic Modellingmentioning

confidence: 99%

“…In previous studies, the use of a flexible dynamic vibration absorber (DVA) was proposed to suppress the high-frequency micro vibrations of the flywheel [1][2][3], in this method, rubber pads were used to increase the stiffness and damping of the DVA. In this study, friction pads made of epoxy phenolic glass cloth were used to replace the rubber pads in the damping ring, the elastic modulus of the friction pad is 1 GPa.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and experimental investigations on a friction ring damper for a flywheel

Wang²,

Zheng³

et al. 2022

Nonlinear Dyn

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A damping strategy using a friction ring damper for an industrial flywheel was numerically and experimentally investigated. The friction ring damper, located on the arms of the flywheel, was experimentally found to effectively reduce the vibration amplitude of the flywheel. The vibration energy is dissipated when relative motions occur at the friction contact interfaces. Nonlinear dynamic analysis based on a lumped-parameter model of a flywheel equipped with a friction ring damper was conducted.A dimensionless parameter, κ, defined as the ratio of the critical friction force to the amplitude of harmonic force, was used to evaluate the damping performance. For several values of κ, steady-state responses under harmonic excitation and nonlinear modes were obtained using the harmonic balance method (HBM) combined with the alternating frequency-time domain method (AFT). The forced response analysis proved the existence of an optimal value of κ, which can minimize the vibration amplitude of the flywheel. The nonlinear modal analysis showed that all the damping ratio-frequency curves are completely coincident even for different κ, and the frequency corresponding to the maximum damping ratio is equal to the frequency at the intersection of the forced response curves under the fully 2 slip and the fully stick states of the friction contact interface. By analyzing the behaviors of the friction contact interface, it is shown that the friction contact interface provides damping in the combined stickslip state. The forced response under random excitation was calculated using the Runge-Kutta method and the friction interface behaviors were analyzed. Finally, spectral testing was conducted to verify the numerical results.

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Section: Dynamic Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigations on a friction ring damper for a flywheel

Wang²,

Zheng³

et al. 2022

Nonlinear Dyn

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“…Disc springs are axially loaded conical shaped washers with a wide range of applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. They are specified in the European standards DIN EN 16983 [ 35 ] and DIN EN 16984 [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

A New Method for the Calculation of Characteristics of Disc Springs with Trapezoidal Cross-Sections and Rounded Edges

et al. 2022

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In the European standards specifying disc spring manufacturing, geometry, shape and characteristic, an edge rounding is prescribed. Common methods for the calculation of disc spring characteristics, even in these standards, are based on a rectangular cross-section. This discrepancy can lead to a considerable divergence of the computed characteristic from the characteristic determined by testing. In literature, this divergence has not yet been examined with regard to rounded edges. In this paper, a new method addressing this problem is introduced. For this purpose, the geometry of idealized disc springs is parameterized. Based on four edge radii and two angles of the inner and outer faces, equations to compute the initial cone angle and the lever arm are introduced. These equations are used to formulate an algorithm to adapt other computation methods to non-rectangular cross-sections and rounded edges. The method is applied to the formulas by Almen–Laszlo, Curti–Orlando, Zheng and those by Kobelev. FE simulations of disc springs with rounded edges and a non-rectangular cross-section were used to verify the new formulas. The results show that the introduced method can be applied to known characteristic computation methods and result in a model expansion taking cross-section variations into account. The adjusted characteristics show more accurate alignment to the FE simulation for the cross-section variations investigated. These findings not only close the geometric gap between the manufacturing guidelines and the computation on an analytical basis, they also define a new parameter space for designs of disc springs and a corresponding force computation method to optimize spring characteristics.

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Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigations on a Friction Ring Damper for a Flywheel

Zheng

Huang

et al. 2021

Preprint

Self Cite

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A damping strategy using a friction ring damper for an industrial flywheel was numerically and experimentally investigated. The friction ring damper, located on the arms of the flywheel, was experimentally found to effectively reduce the vibration amplitude of the flywheel. The vibration energy is dissipated when relative motions occur at the friction contact interfaces. Nonlinear dynamic analysis based on a lumped-parameter model of a flywheel equipped with a friction ring damper was conducted. A dimensionless parameter, κ, defined as the ratio of the critical friction force to the amplitude of harmonic force, was used to evaluate the damping performance. For several values of κ, steady-state responses under harmonic excitation and nonlinear modes were obtained using the harmonic balance method (HBM) combined with the alternating frequency–time domain method (AFT). The forced response analysis proved the existence of an optimal value of κ, which can minimize the vibration amplitude of the flywheel. The nonlinear modal analysis showed that all the damping ratio–frequency curves are completely coincident even for different κ, and the frequency corresponding to the maximum damping ratio is equal to the frequency at the intersection of the forced response curves under the fully slip and the fully stick states of the friction contact interface. By analyzing the behaviors of the friction contact interface, it is shown that the friction contact interface provides damping in the combined stick–slip state. The forced response under random excitation was calculated using the Runge–Kutta method and the friction interface behaviors were analyzed. Finally, spectral testing was conducted to verify the numerical results.

show abstract

High-frequency disturbance force suppression mechanism of a flywheel equipped with a flexible dynamic vibration absorber

Cited by 10 publications

References 16 publications

Numerical and experimental investigations on a friction ring damper for a flywheel

Numerical and experimental investigations on a friction ring damper for a flywheel

A New Method for the Calculation of Characteristics of Disc Springs with Trapezoidal Cross-Sections and Rounded Edges

Numerical and Experimental Investigations on a Friction Ring Damper for a Flywheel

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