Lateral-Torsional Coupling Characteristics of a Two-Stage Planetary Gear Rotor System

Table 6

Comparison of the lateral natural frequencies between calculation and test.

Mode No.	Test; (Hz)	Uncoupled; (Hz)	Error; (%)	Partial coupled; (Hz)	Error; (%)	Full coupled; (Hz)	Error; (%)
3	82.9	83.7	1.0	83.7	1.0	83.7	1.0
4	83.5	83.7	0.2	83.7	0.2	83.7	0.2
11	352.5	369.7	4.9	369.7	4.9	369.9	4.9
12	368.7	369.8	0.3	369.8	0.3	367.0	0.5
18	454.2	550.4	21.2	550.4	21.2	555.5	22.3
19	435.5	550.8	26.5	550.8	26.5	555.8	27.6
23	802.7	765.6	4.6	765.6	4.6	765.7	4.6
24	794.6	765.7	3.6	765.7	3.6	765.7	3.6