A Study on Dynamic Behaviour of Thermally Distributed Exponentially Graded Rotor System with Induced Porosities

Table 1

Whirl frequencies of a nonporous FG rotor-bearing system.

Modes	Present		Sathujoda et al. [24]		Error (%)
	ΔT = 0	ΔT = 600	ΔT = 0	ΔT = 600	ΔT = 0	ΔT = 600
1 BW	24.063	23.211	24.066	23.214	0.0125	0.0129
1 FW	24.125	23.292	24.128	23.295	0.0124	0.0129
2 BW	78.646	77.348	78.656	77.358	0.0127	0.0129
2 FW	128.869	127.913	128.886	127.930	0.0132	0.0133
3 BW	270.226	246.571	270.262	246.602	0.0133	0.0126
3 FW	293.155	266.928	293.193	266.962	0.0130	0.0127