Abstract
A stochastic uncertain tribodynamic model is established for a spur gear pair for the first time. The stochastic uncertainty of pinion rotation speed propagated to lubrication performance is investigated. The probability density function of the minimum lubricant film thickness hmin evolves over time periodically at interval of an engagement process. Correspondence between abrupt increase in meshing force and amplification of hmin uncertainty is found. Robust and reliable lubrication performance can be achieved by suppressing the hmin uncertainty and decreasing the lubrication failure probability. This can be done by increasing lubricant viscosity, and decreasing input torque and uncertainty level of input rotation speed. This work lays a solid foundation for robust and reliability based optimization for tribodynamic gear system.
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Acknowledgement
We would like to acknowledge the support of the National Natural Science Foundation of China (52205287), the Zhejiang Provincial Natural Science Foundation of China (LY22E050006), and the Fundamental Research Funds for the Central Universities (2021-KYY-508105-0003).
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Zhou CHEN. He received his B.S. and Ph.D. degrees in mechanical engineering from Harbin Institute of Technology, China, in 2014, and Technion, Israel Institute of Technology, Israel, in 2019, respectively. He continued to receive his postdoc training at Technion till 2020. He is currently an assistant professor at School of Mechanical Engineering in Zhejiang University, China. His research area is the uncertainty in tribodynamics.
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Chen, Z., Sha, H., Li, S. et al. Stochastic uncertain lubrication in gear transmission subjected to tribodynamic loading. Friction (2024). https://doi.org/10.1007/s40544-023-0843-6
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DOI: https://doi.org/10.1007/s40544-023-0843-6