Vortex Trajectory of Rotating Shaft Undergoing Vibration Coupling of Parallel Multicylinders

Table 4

FFT main data of vibration acceleration of three-cylinder unilateral drive cylinder I in the horizontal position of the bearing seat in the Y direction.

Rotating speed (r/min)	Frequency range (Hz)	Cylinder I with counterweight 127.89 g				Cylinder II with counterweight 227.89 g
		Frequency 1 (Hz)	Peak 1 (m/s^2)	Frequency 2 (Hz)	Peak 2 (m/s^2)	Frequency 1 (Hz)	Peak 1 (m/s^2)	Frequency 2 (Hz)	Peak 2 (m/s^2)
600	0–30	22.34	0.123	10.00	0.096	22.34	0.180	10.00	0.034
	0–500	180.3	0.737	194.7	0.622	180.0	1.051	187.2	0.924
650	0–30	21.72	0.126	10.94	0.102	21.72	0.158	10.78	0.038
	0–500	203.4	0.883	195.6	0.876	195.2	0.745	203.0	0.597
700	0–30	11.72	0.180	23.44	0.124	25.16	0.091	11.72	0.052
	0–500	210.5	0.899	218.9	0.668	209.8	0.724	218.2	0.803
750	0–30	12.50	0.256	25.00	0.134	12.50	0.092	21.87	0.069
	0–500	233.8	0.559	225.0	0.434	225.3	0.615	234.4	0.567
800	0–30	13.28	0.241	26.64	0.181	13.28	0.105	22.97	0.086
	0–500	250.0	0.852	230.7	0.696	249.8	1.062	230.6	0.571