Rotordynamic Evaluation of Full Scale Rotor on Tilting Pad Bearings with 0.1 and 0.3 Preload

Table 4

Identified result based on MIMO FRF and SISO dFRF.

MIMO FRF
	Frequency 𝑓/Hz	Damping ratio	Frequency 𝑓/Hz	Damping ratio
𝐻𝑥𝑥 𝐻𝑥𝑦
MIMO FRF	83.98	0.0202	84.09	0.0200
	88.91	0.0268	89.06	0.0243
SISO dFRF
	Frequency 𝑓/Hz	Damping ratio	Frequency 𝑓/Hz	Damping ratio
SISO dFRF	−83.81	0.0210	84.08	0.0194
	−89.38	0.0237	89.19	0.0259

Note: negative frequency means backward, and positive frequency means forward.