Vortex Trajectory of Rotating Shaft Undergoing Vibration Coupling of Parallel Multicylinders

Table 3

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

Rotating speed (r/min)	Frequency range (Hz)	Single-cylinder drive without load				Cylinder I with counterweight 127.89 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	20.00	0.074	10	0.047	10.00	0.107	20.00	0.073
	0–500	190.1	0.209	170.2	0.195	190.0	0.280	170.0	0.244
650	0–30	21.72	0.185	10.78	0.040	21.72	0.161	10.78	0.119
	0–500	401.2	0.268	195.2	0.240	195.0	0.235	400.1	0.229
700	0–30	11.72	0.059	22.34	0.047	11.72	0.175	21.56	0.042
	0–500	198.4	0.269	408.4	0.171	198.4	0.211	210.0	0.187
750	0–30	12.50	0.098	22.19	0.036	12.50	0.295	22.00	0.168
	0–500	237.7	0.380	219.0	0.294	237.3	0.325	12.50	0.295
800	0–30	13.28	0.145	26.56	0.078	26.56	0.363	13.28	0.327
	0–500	239.7	0.690	253.0	0.416	240.0	0.676	253.3	0.425