Reliability and Sensitive analysis of the Tooth Contact strength Based on Response Surface and Monte Carlo Methods

摘要

The thermo-elastic contact characteristics of standard spur gears with the ANSYS software's Indirect coupling analysis method and achieve the limit state function of contact strength of tooth surface with the response surface method. It also studies the probabilistic sensitivity of the limit state function to the random variable with the reliable and sensitive analysis method of Monte Carlo and to achieve the Sensitivity information of various random factors on the reliability of contact strength of tooth surface under thermo elastic coupling state. Research results show that in the reliability design process the randomness of the temperature of the oil gas mixture in the accessory casing can be neglected and the constant treatment. It can effectively improve the gear tooth contact strength reliability through Increase the contact stress of the tooth surface, Reduce gear torque, Choose the gear material with smaller linear expansion coefficient and lower oil supply temperature and reduce the discrete range of random variable at the same time.