Certain Type Turbofan Engine Whole Vibration Model with Support Looseness Fault and Casing Response Characteristics

Table 4

Parameters of ball bearing.

Rolling bearing	Outer raceway radius /mm	Inner raceway radius /mm	Ball number	Contact stiffness /(N/m^3/2)	Bearing clearance /um	Outer mass (kg)	Bearing carrier mass (kg)
	39.5	29	13	12.4 × 10^9	0	2	10
	39.5	29	13	12.4 × 10^9	0	2	10
	32	17	14	11.9 × 10^9	0	2	10
	32	17	14	11.9 × 10^9	0	2	10