Aircraft bearing life reliability design and analysis under multiple distributed loads with AFSOM method

摘要

Accurate design and calculation of the aircraft bearing life reliability have the significant importance for the reliability design of the aviation subsystem components. This paper proposes a new method for solution of the bearing life reliability by AFSOM method under considering load fluctuation. When the bearing life reliability is between 0.4 and 0.9, the bearing reliable life obeys the two parameter Weibull distribution; According to that, the relationship between the bearing life reliability and the reliable life correction coefficient is established. When the bearing life reliability is between 0.9 and 1, the function is established based on the curve fitting. By considering the load fluctuation, reliable life correction coefficient and the limit state equation of bearing life reliability, it can solve the bearing life reliability through the AFSOM method. This method is easy and reasonable, highly reliable and suitable for engineering application.