Wear analysis of revolute joints with clearance in multibody systems

Bai, Zhengfeng; Zhao, Yang; Wang, Xinggui

doi:10.1007/s11433-013-5125-2

Cited by 32 publications

(15 citation statements)

References 21 publications

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“…Wear depth values of shaft and wearing are both set as half of the total wear depth. Based upon revolute pair geometric properties, new journal and bearing radius at each discrete region after wear can be given by the following equation [20,23]:…”

Section: Surface Reconstruction After Wear For Revolute Clearancementioning

confidence: 99%

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Dynamic Response Analysis of Planar Multilink Mechanism considering Wear in Clearances

Jiang

Chen

Deng

2019

Shock and Vibration

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Clearance wear is one of the factors that affects dynamics for mechanical systems. A numerical methodology suitable for modeling and calculation of wear at multiple revolute clearance pairs in the field of the planar multilink mechanism is proposed. In this paper, the 2-DOF nine-bar mechanism considering two revolute clearance joints is regarded as the study object. Normal contact force and friction force models of revolute clearance joints used Lankarani–Nikravesh (L-N) and LuGre models, respectively. The iterative wear prediction process based upon Archard’s model has been applied to calculate wear characteristics. The wear prediction procedure is integrated with multibody dynamics, wear depths at revolute clearance joints are calculated, and the surface of shaft and bearing is reconstructed twice. The dynamic responses of mechanism considering two nonregular revolute clearances caused by wear are studied in depth. The nonlinear characteristics of the mechanism after wear are studied by the phase diagram and Poincaré map. Influences of different initial constant clearance values and different driving speeds on wear of two revolute joints are also researched. The results show that it is necessary to consider the factor of irregular clearances caused by wear in analysis of dynamics of precision mechanisms. Initial constant clearance values and driving speeds have some influence on wear phenomenon. This research provides a theoretical basis for studying dynamics of the planar multilink mechanism considering wear in multiple clearances.

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Section: Surface Reconstruction After Wear For Revolute Clearancementioning

confidence: 99%

“…And the effect of diverse constant clearance sizes on wear depth was also studied. Bai et al [20] investigated wear prediction at revolute pair for four-bar mechanism by using a computational method. A novel hybrid contact force and a modified Coulomb friction model were, respectively, used as normal contact and friction models.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of Planar Multilink Mechanism considering Wear in Clearances

Jiang

Chen

Deng

2019

Shock and Vibration

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“…However, clearance in planetary gears are inevitable due to manufacturing and assembly errors, fatigue and wear. Moreover, those clearances cause contacts and impacts between gear sets, and consequently affect the control accuracy [3][4][5][6][7]. With the development of space technology, the high precision and high reliability of spacecraft mechanisms are increasingly required, thus research on the vibration characteristics of planetary gear systems is receiving more and more attention.…”

Section: Introductionmentioning

confidence: 99%

Vibration Characteristics Analysis of Planetary Gears with a Multi-Clearance Coupling in Space Mechanism

Zhang

Fan

et al. 2018

Energies

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Multi-clearance is the main cause for the performance and reliability decline of complicated mechanical systems. The increased clearance could induce contacts and impacts in joints, and consequently affect control accuracy. A nonlinear dynamic model of planetary gears with multi-clearance coupling is proposed in the current study to investigate the mechanism of influence of clearance on the dynamic performance. In addition, the coupling relationship between radial clearance and backlash is integrated into the multi-body system dynamics. The vibration characteristics of planetary gears with the changes of rotational velocity, clearance size and inertia load are explored. The numerical simulation results show that there are complex coupling relations in planetary gear systems, due to the multi-clearance coupling. The phenomenon of system resonance may occur with the changes of rotational velocities and clearances’ sizes. Multi-clearance coupling can significantly increase the resonant response of planetary gear systems in empty-load or light-load states.

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“…The experimental results show that a model based on the finite element method can produce accurate predictions of the wear profile in a revolute joint. 30 More recently, Bai et al 31 introduced a computational method to predict wear in a revolute joint with clearance in a multibody system. The results of this work also showed that wear is not regular around the joint's surface.…”

Section: Introductionmentioning

confidence: 99%

A method for contact analysis of revolute joints with noncircular clearance in a planar multibody system

Han

2016

Proceedings of the Institution of Mechanical Engineers, Part K:

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Journal bearings are generally used to comprise a revolute joint in mechanical systems. Noncircularity and clearance in journal bearing are obvious due to a long time of nonuniform wear. In this regard, a method of analyzing the contact in revolute joints with noncircular clearances in a multibody system is proposed. The revolute joint with noncircular clearance is assumed to be constituted by an elliptic bore and a pin. The method described is not representative of an elliptic bore journal bearing in a detailed manner. This method involves discretizing the geometric profile of the bushing of the revolute joint. By analyzing the relative separations between the discrete points and the geometric center of the pin, the contact area between the bushing and the pin can be judged and the maximum contact depth obtained. Compared with traditional methods, the proposed method has the advantage that it can be used to analyze noncircular contact problems in revolute joints with a clearance. A slider-crank mechanism is used as an example to compare the effects of the geometrical properties of circular and noncircular (elliptical) revolute joints with clearance on the dynamic response of the mechanisms. The results show that clearance joints with noncircular geometry predominantly affect the dynamic stability of a high-speed mechanism. Moreover, the efficiency of the contact analysis and model solving precision are strongly dependent on the number of discrete points in the geometric profile of the joint elements. The size of the joint clearance has a small effect on the solving efficiency of the model.

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Wear analysis of revolute joints with clearance in multibody systems

Cited by 32 publications

References 21 publications

Dynamic Response Analysis of Planar Multilink Mechanism considering Wear in Clearances

Dynamic Response Analysis of Planar Multilink Mechanism considering Wear in Clearances

Vibration Characteristics Analysis of Planetary Gears with a Multi-Clearance Coupling in Space Mechanism

A method for contact analysis of revolute joints with noncircular clearance in a planar multibody system

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