期刊
ENGINEERING FAILURE ANALYSIS
卷 66, 期 -, 页码 502-514出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2016.05.006
关键词
Tooth crack; Mesh stiffness; Analytical method; Dynamic response; Gear transmission
资金
- National Natural Science Foundation of China [51405400, 51375403]
- Fundamental Research Funds for the Central Universities [2682015ZD12]
- Fundamental Research Funds for State Key Laboratory of Traction Power of Southwest Jiaotong University [2015TPL_T14]
Gear tooth crack is likely to happen when a gear transmission train is working under excessive and/or long-term dynamic loads. Its appearance will reduce the effective tooth thickness for load carrying, and thus cause a reduction in mesh stiffness and influence the dynamic responses of the gear transmission system, which enables the possibility for gear fault detection from variations of the dynamic features. Accurate mesh stiffness calculation is required for improving the prediction accuracy of the dynamic features with respect to the tooth crack fault. In this paper, an analytical mesh stiffness calculation model for non-uniformly distributed tooth root crack along tooth width is proposed based on previous studies. It enables a good prediction on the mesh stiffness for a spur gear pair with both incipient and larger tooth cracks. This method is verified by comparisons with other analytical models and finite element model (FEM) in previous papers. Finally, a dynamic model of a gear transmission train is developed to simulate the dynamic responses when cracks with different dimensions are seeded in a gear tooth, which could reveal the effect of the tooth root crack on the dynamic responses of the gear transmission system. The results indicate that both the mesh stiffness and the dynamic response results show that the proposed analytical model is an alternative method for mesh stiffness calculation of cracked spur gear pairs with a good accuracy for both small and large cracks. (C) 2016 Elsevier Ltd. All rights reserved.
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