Research on dynamic modeling and simulation verification of a new type of FT pin-cycloid transmission

Xuan, Liang; Xie, Chao; Guan, Tianmin; Lei, Lei; Jiang, Heng

doi:10.1177/0954406219861999

Cited by 9 publications

(3 citation statements)

References 19 publications

(17 reference statements)

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“…Studies in the field of cycloidal gearbox engineering deal with the subject of design issues [7][8][9][10][11][12][13], finite element analysis of the cycloidal gearbox parts [7,[13][14][15][16][17], kinematical analysis [16,18], applications in robotics [12,16,17,19], friction, lubrication and machining [20][21][22][23][24], measurements [25], efficiency [26,27], optimisation [8,28], contact modelling [29][30][31][32], backlash and design tolerances [9,30,[33][34][35] or vibration and dynamics [31,32,[36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Multibody Dynamics Model of the Cycloidal Gearbox, Implemented in Fortran for Analysis of Dynamic Parameters Influenced by the Backlash as a Design Tolerance

Król

2023

Acta Mechanica Et Automatica

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In this study, dynamical parameters of the cycloidal gearbox working at the constant angular velocity of the input shaft were investigated in the multibody dynamics 2D model implemented in the Fortran programming language. Time courses of input and output torques and forces acting on the internal and external sleeves have been shown as a function of the contact modelling parameters and backlash. The analysis results in the model implemented in Fortran were compared with the results in the 3D model designed using MSC Adams software. The values of contact forces are similar in both models. However, in the time courses obtained in MSC Adams there are numerical singularities in the form of peaks reaching 500 N for the forces at external sleeves and 400 N for the forces acting at internal sleeves, whereas in the Fortran model, there are fewer singularities and the maximum values of contact forces at internal and external sleeves do not exceed 200 N. The contact damping and discretisation level (the number of discrete contact points on the cycloidal wheels) significantly affect the accuracy of the results. The accuracy of computations improves when contact damping and discretisation are high. The disadvantage of the high discretization is the extended analysis time. High backlash values lead to a rise in contact forces and a decrease in the force acting time. The model implemented in Fortran gives a fast solution and performs well in the gearbox optimisation process. A reduction of cycloidal wheel discretisation to 600 points, which still allows satisfactory analysis, could reduce the solution time to 4 min, corresponding to an analysis time of 0.6 s with an angular velocity of the input shaft of 52.34 rad/s (500 RPM).

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Section: Introductionmentioning

confidence: 99%

Multibody Dynamics Model of the Cycloidal Gearbox, Implemented in Fortran for Analysis of Dynamic Parameters Influenced by the Backlash as a Design Tolerance

Król

2023

Acta Mechanica Et Automatica

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“…Over recent decades, Kudrijavcev [2] and Malhotra et al [3] studied the static modelling of a cycloid-pinwheel transmission. The former [2] proposed an accurate force model of a cycloid-pin gear with the ideal dimensions based on the assumption of constant output torque, providing references for the subsequent calculation of cycloid-pin meshing stiffness [4]. The latter [3] investigated the forces of various elements and the influence of design parameters on the contact stress.…”

Section: Introductionmentioning

confidence: 99%

Static Modelling and Analysis of a Novel Movable Tooth Drive with Logarithmic Spiral Tooth Profiles

Zhou

Yang

2022

Machines

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This paper presents a static model for a novel movable tooth drive with logarithmic spiral tooth profiles, to research contact force and load distribution during the meshing period. According to the geometric properties of the conjugate tooth profiles, their compatibility law considering the multi-tooth elastic meshing effect are investigated to reveal load distribution characteristic of the teeth. The static model of the mechanism is thus developed to systematically analyze variation in contact force during the rise travel. The results indicate that the contact force between the tooth and ring gear is proportional to the curvature radius of the contact point, and it increases exponentially and monotonically corresponding to the curvature radius of logarithmic spiral tooth profile; in the multi-tooth meshing condition, the load distribution of the teeth coincides with the ratio of the curvature radius of each contact point, and periodical pulsations of total contact force occur at the alternation of the teeth. Finally, the proposed model is validated by the FEM simulation of a prototype, and the influence of dimensional parameters is further discussed for the self-locking and force transmission characteristics of the tooth. The outcomes provide critical technical support for the static modelling and design of such transmission mechanism.

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“…The dynamic responses of a planetary gear are analysed under considering time-varying pressure angles and contact ratios caused by bearing deformations. Xuan et al [3] established the dynamic model of transmission and studied the dynamic characteristics of FT reducer at the transmission joint. Tang et al [4] established finite element model of traction gear transmission system for the high-speed train CRH380A, and based on transient dynamics, analysed the distribution and variation of equivalent stress and contact pressure on the gear tooth surface.…”

Section: Introductionmentioning

confidence: 99%

Noise Prediction of Traction Gear in High-Speed Electric Multiple Unit

Tang¹,

Chen²,

Sun³

et al. 2019

Int. j. simul. model.

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The dynamic characteristics of traction gear transmission system have great influence on the safety, comfort and reliability of EMU. Base on acoustic-structural coupled theory, the noise radiation characteristics of gear transmission system in high-speed train CRH380A are researched by finite element-boundary element method. Based on the multi-body dynamics theory, the dynamic meshing characteristics of the gear transmission system are revealed by RecurDyn. The natural frequency and the natural mode of vibrating are analysed for system by finite element method, and the vibration response curves of transmission gears under continuous working conditions are solved by modal superposition method. Furthermore, the radiated noise is predicted based on the acoustic radiation analysis model constructed by the acoustic BEM and Helmholtz boundary integral equation. The research results can provide theoretical basis for the optimization design of the low noise gear in EMU.

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Research on dynamic modeling and simulation verification of a new type of FT pin-cycloid transmission

Cited by 9 publications

References 19 publications

Multibody Dynamics Model of the Cycloidal Gearbox, Implemented in Fortran for Analysis of Dynamic Parameters Influenced by the Backlash as a Design Tolerance

Multibody Dynamics Model of the Cycloidal Gearbox, Implemented in Fortran for Analysis of Dynamic Parameters Influenced by the Backlash as a Design Tolerance

Static Modelling and Analysis of a Novel Movable Tooth Drive with Logarithmic Spiral Tooth Profiles

Noise Prediction of Traction Gear in High-Speed Electric Multiple Unit

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