Reliability Analysis of Bending Fatigue of Spiral Bevel Gears Based on Stress-Strength Interference Theory

Based on the stress-strength interference theory, a reliability analysis model for bending fatigue of spiral bevel gears was established using the first order second moment method and the Monte Carlo simulation method, respectively. The distribution rules of bending stress and bending strength were obtained. The reliability results verified the accuracy of the reliability simulation calculation model established using the Monte Carlo method; Based on the first order second moment method, reliability sensitivity analysis was conducted on the mean value and standard deviation of the basic random variables that affect the reliability of bending fatigue. The results shows the degree and trend of the impact of different factors on reliability, and the increase of the standard deviation of each random variable would reduce the reliability, providing theoretical guidance and optimization direction for the subsequent reliability optimization design.