Aiming at the problem of engine failure caused by fatigue failure of aero-engine turbine blades,this paper analyzes the structural reliability of aero-engine turbine blades,so as to carry out fault risk assessment and optimize the inspection time of turbine blades.Taking the turbine blade material GH4033 commonly used in aero-engines in China as the research object,the stress-strength interference model is used to predict the life of turbine blades based on the P-S-N curve combined with the fatigue test data of GH4033 material.At the same time,when the stress parameters and safety factor K are known and the strength parameters are unknown,the maximum likelihood estimation of the strength parameters is made.The results show that the maximum likelihood estimation is close to the true value.
维普
万方数据