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

Table 5

Comparison of the torsional natural frequencies between calculation and test.

Mode No.	Test; (Hz)	Uncoupled; (Hz)	Error; (%)	Partial coupled; (Hz)	Error; (%)	Full coupled; (Hz)	Error; (%)
2	55.8	- -	- -	- -	- -	56.6	1.4
5	145.8	151.0	3.6	151.0	3.6	151.2	3.7
6	259.6	259.4	0	259.4	0	248.5	4.3