Fatigue Reliability Analysis System for Key Components of Aero-Engine

Table 5

Statistical characteristics of random variables.

Random variable	Distribution type	Mean value	Coefficient of variation
1st rotation speed (r/min)	Normal	17650	0.02
2nd rotation speed (r/min)	Normal	16446	0.02
3rd rotation speed (r/min)	Normal	9210	0.02
Young’s modulus (MPa)	Normal	165000	0.01
Poisson’s ratio	Normal	0.33	0.01
Thermal expansion coefficient	Normal		0.01