Mathematical Problems in Engineering

Research Article

Response Characteristics of Looseness-Rubbing Coupling Fault in Rotor-Sliding Bearing System

The combined frequency comparison of the simulation and the experiment.


	Rotational speed/(r/min)	Frequency component/Hz

Simulation		f_r
	1,000 ≤ ω ≤ 2,750	f_r, 2f_r, 3f_r
	2,750 < ω < 5,930	1/2f_r, f_r, 3/2f_r, 2f_r, 5/2f_r, 3f_r
	5,930 ≤ ω ≤ 7,980	f_n1, , f_r, , 3/2f_r, 2f_r, 5/2f_r, 3f_r
	7,980 < ω < 8,460	f_n1, 1/3f_r, , 2/3f_r, f_r, , 4/3f_r, 5/3f_r, 2f_r, 3f_r, 1/3f_r spectrum series, etc.
	8,460 < ω < 9,520	1/3f_r, 1/2f_r, , 2/3f_r, f_r, , 4/3f_r, 3/2f_r, 5/3f_r, 2f_r, 3f_r, 1/3f_r spectrum series, 1/2f_r spectrum series, etc.
	9,520 < ω < 10,000	1/4f_r, 1/3f_r, 1/2f_r, , 2/3f_r, 3/4f_r, f_r, , 5/4f_r, 4/3f_r, 3/2f_r, 5/3f_r, 7/4f_r, 2f_r, 3f_r, 1/4f_r spectrum series, 1/3f_r spectrum series, 1/2f_r spectrum series, etc.

Experiment	100 ≤ ω < 1,000	f_r
	1,000 ≤ ω ≤ 2,910	f_r, 2f_r, 3f_r
	2,910 < ω < 6,070	1/2f_r, f_r, 3/2f_r, 2f_r, 5/2f_r, 3f_r
	6,070 ≤ ω ≤ 6,960	f_n1, f_r, 3/2f_r, 2f_r, 5/2f_r, 3f_r
	6,960 < ω < 7,980	1/2f_r, f_r, 3/2f_r, 2f_r, 5/2f_r, 3f_r
	7,980 < ω < 8,580	f_n1, 1/3f_r, 1/2f_r, 2f_n1, f_n2, , 2/3f_r, f_r, , 4/3f_r, 3/2f_r, 5/3f_r, 2f_r, 3f_r, 1/3f_r spectrum series, 1/2f_r spectrum series, etc.
	8,580 < ω < 10,000	1/4f_r, f_n1, 1/3f_r, 1/2f_r, 2f_n1, f_n2, , 2/3f_r, 3/4f_r, f_r, , 5/4f_r, 4/3f_r, 3/2f_r, 5/3f_r, 7/4f_r, 2f_r, 3f_r, 1/4f_r spectrum series, 1/3f_r spectrum series, 1/2f_r spectrum series, etc.