Contact fatigue reliability analysis of rolling bearing based on elastohydrodynamic lubrication

As for special structure rolling bearing which is not easy to implement a large number of fatigue test, an accurate and efficient reliability calculation method that combines response surface method (RSM) with advanced first order second moment method (AFOSM) was developed under elastohydrodynamic lubrication (EHL). Mechanical model of contact stress analysis was established based on EHL and finite element method (FEM), in which the oil pressure was mapped into hertz contact zone. Considering randomness of correlation factors, limit state function applied to contact fatigue reliability analysis of rolling bearing under EHL was established based on the proposed method and tested by F-test. Compared with traditional Monte Carlo method (MCM), time-consuming of the proposed method only accounts for 0.12％ of MCM, both absolute error of reliability is less than 0.02 and relative error less than 23%. Result shows that the proposed method is accurate and efficient, and could correctly reflect the effect of elliptical contact EHL character on contact fatigue reliability and its sensitivity of rolling bearing. © 2020 Totem Publisher, Inc. All rights reserved.