Research and Application on Design Theory of Friction Dual Mass Flywheel with Double-stage Piecewise Variable Stiffness

Song, Liquan

doi:10.3901/jme.2012.15.150

Cited by 5 publications

(6 citation statements)

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“…It makes this DMF has a continuously variable stiffness, which can avoid the impact produced by the abrupt changes in stiffness. A DMF with a two-stage variable stiffness structure is proposed by Song et al [17]. This DMF has low torque and stiffness at small relative rotational angles and high resistance torque and stiffness at large relative rotational angles.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction

Zeng

Huang

et al. 2021

Symmetry

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Multiple sets of spring, spring seat structures are uniformly arranged in circumferential short spring dual mass flywheel (DMF), which generally have a symmetrical structure. The internal springs and spring seats are constrained by the shape of the primary flywheel and the secondary flywheel. At different rotational speeds, the springs and spring seats have different centrifugal forces. To study the dynamic characteristics of the DMF including torque and stiffness with considering the influence of centrifugal force and friction, the discrete method is used to analyze the mechanical actions of the transmission parts in DMF. The torque action between the spring seat and the secondary flywheel is deduced. The dynamic characteristics of the DMF are obtained through analyzing and calculating. Due to the symmetry of the structure, the torque transmitted and the stiffness of the DMF also have specific symmetrical characteristics. Namely, at two relative rotational angles of the same magnitude and opposite direction, the magnitude of the transmitted torque is the same, the direction is opposite. The magnitude and direction of stiffness are the same. The influence of speed, friction coefficient, spring mass, and spring seat mass on the torque and stiffness characteristics are analyzed. Finally, the theoretical analysis is proved to be valid by the torque characteristics test of DMF.

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Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction

Zeng

Huang

et al. 2021

Symmetry

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“…To meet the requirements of small torsional angle and stiffness at low speed and low torque, and large stiffness and output torque at high speed and high input torque, DMFs generally possess nonlinear stiffness characteristics, i.e., its stiffness will change with the relative angular displacement of the primary flywheel and the secondary flywheel. Song et al [18] proposed the design theory of a two-stage piecewise variable stiffness DMF, and the torque characteristics and frequency characteristics are analyzed by theoretical study and experiments. Wang et al [19] investigate the kinetic parameters matching and designing method for a multistage torsional stiffness DMF based on torsional vibration control by using the numerical analysis methods and proved by tests on an actual vehicle.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref [18], a friction damping ring structure is introduced into DMF to further reduce torsional vibration based on the equivalent damping effect of the axial friction torque produced by axial preload. According to the DMF structure, high conformal contact is formed between the introduced friction damping ring and the primary flywheel pressure plate.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Dynamics Analysis of a Dual‐Mass Flywheel with the Conformal Contact Action of Friction Damping Ring and Pressure Plate

Zeng

Huang

et al. 2021

Shock and Vibration

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To study the nonlinear dynamic characteristics of the dual-mass flywheel (DMF) under the conformal contact action between the friction damping ring and primary flywheel pressure plate, the contact action model is established and analyzed based on Winkler model. Through analysis and calculation, the contact deformation, contact pressure at different contact positions, and equivalent torsional contact stiffness are obtained. The nonlinear dynamic analysis model of three-degree-of-freedom (3DOF) which takes the conformal contact into account and two-degree-of-freedom (2DOF) without considering conformal contact is established. The approximate analytical solution of the nonlinear frequency characteristics of the system at steady state is derived. By comparing with the results obtained from numerical method, the theoretical analysis process is proved to be valid. And it is found that the overall amplitude and angular displacement transmissibility of the 3DOF model are smaller than the 2DOF model, especially at resonance frequency. The effects of the friction damping ring moment inertia, stiffness of DMF, and axial friction torque on the frequency characteristics of system and angular displacement transmissibility are analyzed. The forced vibration response analysis of the 3DOF model is conducted, through which the torsional angle variations of the primary flywheel, friction damping ring, and secondary flywheel with time are obtained. The results show that the amplitude of the secondary flywheel is much smaller than that of the primary flywheel, indicating that the DMF has prominent damping performance.

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“…The torsional stiffness of the multi-stage nonlinear stiffness DMF varies with the twist angle, which can meet the requirements of different working conditions. 5…”

Section: Introductionmentioning

confidence: 99%

“…The torsional stiffness of the multistage nonlinear stiffness DMF varies with the twist angle, which can meet the requirements of different working conditions. 5 For the modeling of DMF, Hu et al 6 established a model of static torsional characteristics of DMF based on the arc-spring elastic characteristic formula, and carried out experimental verification, but the frictional damping has not been taken into account. Hysteresis damping has been considered and a nonlinear model of single-stage stiffness DMF has been established and verified by bench test in the Zeng et al 7 Tae et al 8 established a single-stage stiffness DMF model based on the discrete element method and taking nonlinear friction Stribeck effect into account.…”

Section: Introductionmentioning

confidence: 99%

Modeling of multistage nonlinear Dual Mass Flywheel torsional damper based on smoothing function fitting

Chen

Shi

Song

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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The smoothing function is used to solve the problem of low simulation efficiency of multi-stage stiffness Dual Mass Flywheel (DMF) model, and the influence of different smoothing functions and fitting factor β on the fitting effect is studied. Firstly, based on the analysis of the working principle of multi-stage stiffness DMF, a mathematical model of DMF considering multi-stage stiffness and damping nonlinearity is established, and the accuracy of the model is verified by bench test. Then, tanh function, arctangent function, and sigmoid function are used to smooth the segment points in the DMF model, which solves the problem of inefficiency and not easy to converge in simulation. Finally, a 3-DOF model of the transmission system with DMF is established to simulate and analyze the smooth effect of the smoothing function and the performance difference between different smoothing functions. The results show that the smoothing function can effectively improve the stability of the simulation model. By comparing the three smoothing functions, it can be seen that the sigmoid function has the most obvious effect, which can shorten the simulation time by 52%.

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Research and Application on Design Theory of Friction Dual Mass Flywheel with Double-stage Piecewise Variable Stiffness

Cited by 5 publications

References 0 publications

Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction

Dynamic Characteristics Analysis of a Circumferential Short Spring Dual Mass Flywheel with the Influence of Centrifugal Force and Friction

Modeling and Dynamics Analysis of a Dual‐Mass Flywheel with the Conformal Contact Action of Friction Damping Ring and Pressure Plate

Modeling of multistage nonlinear Dual Mass Flywheel torsional damper based on smoothing function fitting

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