基于正态分布的齿轮传动可靠性设计

In this paper, the author proposed a new method of gear design based on the experience of the traditional gear design and a combination of mechanical reliability and probabilistic design method. The method regards stress and strength as a random variable honestly, which will be more scientific than the traditional design, and calculate the reliability of the designed gear.Probabilistic design is an important component of reliability design. It applies the theory of probability and mathematical statistical to design mechanical parts or component. Its essence is that regard all the variables as random variables faithfully in the strength design. In this paper, when the author estimates the reliability of the designed gear, assuming that the gear contacting fatigue strength-contacting stress and the gear bending fatigue strength-bending stress obey a normal distribution, and proposes a new method of calculating the reliability of the designed gear based on probabilistic design method.