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Application of response surface method for contact fatigue reliability analysis of spur gear with consideration of EHL

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Abstract

In order to consider the effects of elastohydrodynamic lubrication (EHL) on contact fatigue reliability of spur gear, an accurate and efficient method that combines with response surface method (RSM) and first order second moment method (FOSM) was developed for estimating the contact fatigue reliability of spur gear under EHL. The mechanical model of contact stress analysis of spur gear under EHL was established, in which the oil film pressure was mapped into hertz contact zone. Considering the randomness of EHL, material properties and fatigue strength correction factors, the proposed method was used to analyze the contact fatigue reliability of spur gear under EHL. Compared with the results of 1.5×105 by traditional Monte-Carlo, the difference between the two failure probability results calculated by the above mentioned methods is 2.2×10−4, the relative error of the failure probability results is 26.8%, and time-consuming only accounts for 0.14% of the traditional Monte-Carlo method (MCM). Sensitivity analysis results are in very good agreement with practical cognition. Analysis results show that the proposed method is precise and efficient, and could correctly reflect the influence of EHL on contact fatigue reliability of spur gear.

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China

    Yun Hu  (胡贇), Shao-jun Liu  (刘少军), Sheng Ding  (丁晟) & Ya-shi Liao  (廖雅诗)

  2. State Key Laboratory for High Performance Complex Manufacturing (Central South University), Changsha, 410083, China

    Yun Hu  (胡贇), Shao-jun Liu  (刘少军), Sheng Ding  (丁晟) & Ya-shi Liao  (廖雅诗)

Authors
  1. Yun Hu  (胡贇)
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  2. Shao-jun Liu  (刘少军)
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  3. Sheng Ding  (丁晟)
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  4. Ya-shi Liao  (廖雅诗)
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Corresponding author

Correspondence to Yun Hu  (胡贇).

Additional information

Foundation item: Project(CX2014B060) supported by Hunan Provincial Innovation for Postgraduate, China; Project(8130208) supported by General Armament Pre-research Foundation, China

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Hu, Y., Liu, Sj., Ding, S. et al. Application of response surface method for contact fatigue reliability analysis of spur gear with consideration of EHL. J. Cent. South Univ. 22, 2549–2556 (2015). https://doi.org/10.1007/s11771-015-2784-3

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  • DOI: https://doi.org/10.1007/s11771-015-2784-3

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