Analysis of Dry Friction-Induced Stick-Slip in an Experimental Test Rig Modeling a Drill String

Computer-vision-based research on friction vibration and coupling of frictional and torsional vibrations in water-lubricated bearing-shaft system

“…The division of this "stick-slip" phase does not include the torsional vibration of the shaft, but rather depends on the direction of the displacement of the rubber block. This is also the most conventional "stick-slip behavior" division method in the literature [13,30]. The entire "stick-slip" process takes 0.015 s (so the frequency is 66.67 Hz), which is the most intuitive cause of vibration at a frequency of 66.5 Hz in the vibration signal.…”