Mechanical Fault Diagnosis and Analysis of Trains Based on Random Fatigue and Gap Nonlinearity

Based on the principle of random fatigue and non-linear train machinery fault diagnosis and analysis, the frequency domain simulation method of car body fatigue strength analysis is established, and the steady random vibration analysis is transformed into the conventional simple harmonic vibration analysis, and the randomness of dangerous points can be obtained accurately and efficiently. Dynamic stress power spectrum response, and further use the frequency domain fatigue damage model to evaluate the fatigue life of the local structure of the car body.