Vortex Trajectory of Rotating Shaft Undergoing Vibration Coupling of Parallel Multicylinders

Table 5

FFT main data of vibration acceleration of three-cylinder bilateral 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	22.17	0.142	10.00	0.106	22.28	0.047	10.00	0.035
	0–500	180.12	0.394	187.3	0.283	180.0	0.375	187.2	0.369
650	0–30	21.67	0.154	10.80	0.098	21.67	0.125	10.80	0.047
	0–500	97.47	0.476	202.8	0.334	202.6	0.405	97.40	0.331
700	0–30	11.66	0.195	25.21	0.112	25.27	0.079	11.66	0.045
	0–500	210.0	0.344	198.4	0.294	210.3	0.328	201.9	0.287
750	0–30	12.51	0.279	25.02	0.167	12.51	0.081	21.54	0.058
	0–500	112.6	0.228	225.3	0.226	225.5	0.332	112.7	0.313
800	0–30	13.31	0.258	22.95	0.208	13.37	0.125	221.10	0.091
	0–500	240.0	0.740	226.7	0.401	240.5	0.627	182.7	0.548