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Remaining Useful Life Prediction for Degradation Process of Gear System with Contact Damage Model

Volume 15, Number 1, January 2019, pp. 241-251
DOI: 10.23940/ijpe.19.01.p24.241251

Jinhai Wanga,b, Jianwei Yanga,b, Qiang Lia, and Hekai Zhub

aSchool of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, 100044, China
bBeijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicle, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China

(Submitted on October 8, 2018; Revised on November 15, 2018; Accepted on December 7, 2018)


Contact fatigue is one of the main causes of the failure of gear transmission systems. Considering the gear separation phenomenon, a contact damage-torsional vibration coupling dynamic model is proposed with nonlinear backlash, time-varying meshing stiffness, contact stress model, and contact damage model based on gear contact geometry, S-N curve, and reliability theory. Using the model established, the numerical simulation is investigated to analyze the degradation process of the gear system under a fixed-speed condition. The research results show that the degradation process of gear contact fatigue has a non-linear relation with rotational speed and rotation cycle. The contact stress shows that there is no obvious gear separation phenomenon at n = 1000 and n = 3000, but there are obvious gear separation phenomena at n = 2000. The remaining useful life of gear teeth changes more violently and the total life is lowest at n = 2000.


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