Dynamic Characteristics of Magnetic Suspended Dual-Rotor System by Riccati Transfer Matrix Method

Table 3

Results comparison between FEM and the Riccati transfer matrix method.

Order	Damped critical speeds (Hz)			Logarithmic decrements
	Riccati	FEM	Error (%)	Riccati	FEM	Error (%)
1	135.53	133.16	1.78	4.05	3.90	3.85
2	162.72	143.65	12.28	4.86	4.79	1.46
3	521.92	514.41	1.46	0.093	0.081	14.82