ABSTRACT
The reliability analysis of components under random vibration mainly includes two methods: time domain and frequency domain (Andrew, 1998). The analysis based on time domain features, such as uncertain amplitude, unrepeated vibration waveform, and large volume of data to be processed, namely, for a certain time t, the vibration amplitude and frequency are stochastic. However, because the amplitude and frequency have certain statistical laws, the frequency domain analysis method based on the power spectral density is simple in calculation and does not require cyclic counting. The frequency domain analysis method has been broadly applied to estimate the fatigue life of the dangerous location of components in automobile, aerospace, machine manufacturing industries, etc. (Li, 2005).
