Effect of friction coefficients on the dynamic response of gear systems

doi:10.1007/s11465-017-0415-4

Front. Mech. Eng.

2017, Vol. 12

Issue (3) : 397-405 https://doi.org/10.1007/s11465-017-0415-4

RESEARCH ARTICLE

Effect of friction coefficients on the dynamic response of gear systems

Lingli JIANG^1,²(

), Zhenyong DENG¹, Fengshou GU², Andrew D. BALL², Xuejun LI¹

¹. Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, China
². Centre for Efficiency and Performance Engineering, University of Huddersfield, Huddersfield HD1 3DH, UK

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Abstract

The inevitable deterioration of the lubrication conditions in a gearbox in service can change the tribological properties of the meshing teeth. In turn, such changes can significantly affect the dynamic responses and running status of gear systems. This paper investigates such an effect by utilizing virtual prototype technology to model and simulate the dynamics of a wind turbine gearbox system. The change in the lubrication conditions is modeled by the changes in the friction coefficients, thereby indicating that poor lubrication causes not only increased frictional losses but also significant changes in the dynamic responses. These results are further demonstrated by the mean and root mean square values calculated by the simulated responses under different friction coefficients. In addition, the spectrum exhibits significant changes in the first, second, and third harmonics of the meshing components. The findings and simulation method of this study provide theoretical bases for the development of accurate diagnostic techniques.

Keywords dynamic response friction coefficient wind loads wind turbine gearbox

Corresponding Author(s): Lingli JIANG

Just Accepted Date: 23 December 2016 Online First Date: 12 January 2017 Issue Date: 04 August 2017

Cite this article:

Lingli JIANG,Zhenyong DENG,Fengshou GU, et al. Effect of friction coefficients on the dynamic response of gear systems[J]. Front. Mech. Eng., 2017, 12(3): 397-405.

URL:

https://academic.hep.com.cn/fme/EN/10.1007/s11465-017-0415-4
https://academic.hep.com.cn/fme/EN/Y2017/V12/I3/397

Fig.1 3D gears model

Tab.1 Gears parameters

Fig.2 Gear dynamic model

Fig.3 Drive settings

Fig.4 Load settings

Fig.5 Angular velocity of the driven gear

Fig.6 Total meshing force. (a) Time domain; (b) frequency domain

Tab.2 Comparisons of the simulated and theoretical calculations

Fig.7 Meshing force in the X direction when m=0.1. (a) Time domain; (b) frequency domain

Fig.8 Meshing force in the Y direction when m=0.1. (a) Time domain; (b) frequency domain

Fig.9 Mean values of meshing force under different friction coefficients. (a) X direction; (b) Y direction

Fig.10 RMS values of meshing force under different friction coefficients. (a) X direction; (b) Y direction

Fig.11 Amplitudes at meshing harmonic frequencies in the X direction under different friction coefficients. (a) First-order frequency; (b) second-order frequency; (c) third-order frequency

Fig.12 Amplitudes at meshing harmonic frequencies in the Y direction under different friction coefficients. (a) First-order frequency; (b) second-order frequency; (c) third-order frequency

Fig.13 Angular acceleration of a driven gear in Z direction when m=0.1. (a) Time domain; (b) frequency domain

Fig.14 Mean and RMS values of angular acceleration in Z direction under different friction coefficients. (a) Average value; (b) RMS

Fig.15 Amplitudes of angular acceleration at meshing harmonic frequencies in Z direction under different friction coefficients. (a) First-order frequency; (b) second-order frequency; (c) third-order frequency

Fig.16 Mean values of the meshing force under different friction coefficients and different loads. (a) X direction; (b) Y direction

Fig.17 RMS values of meshing force under different friction coefficients and different loads. (a) X direction; (b) Y direction

Fig.18 Amplitudes of the meshing harmonic frequencies in the X direction under different friction coefficients and different loads. (a) First-order frequency; (b) second-order frequency; (c) third-order frequency

Fig.19 Amplitudes of the meshing harmonic frequencies in the Y direction under different friction coefficients and different loads. (a) First-order frequency; (b) second-order frequency; (c) third-order frequency

Fig.20 (a) Mean and (b) RMS values of angular acceleration in the Z direction under different friction coefficients and different loads

Fig.21 Amplitudes of the meshing harmonic frequencies in the Z direction under different friction coefficients and different loads. (a) First-order frequency; (b) second-order frequency; (c) third-order frequency

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