Abstract
In this paper, we considered a dual-rotor system with crack in shaft. The influence of circular crack in hollow shaft on dynamical response was studied. The equations of motion of 12 elements dual-rotor system model were derived. Harmonic balance method was employed to solve the equations. The critical speed and sub-critical speed responses were investigated. It was found that the circular crack in hollow shaft had greater influence on the first-backward critical speed than the first-forward critical speed. Owing to the influence of crack, the vibration peaks occurred at the 1/2, 1/3 and 1/4 critical speeds of the rotor system, along with a reduction in sub-critical speeds and critical speeds. The deeper crack away from the bearing affected the rotor more significantly. The whirling orbits, the time-domain responses and the spectra were obtained to show the super-harmonic resonance phenomenon in hollow-shaft cracked rotor system.
| Original language | English |
|---|---|
| Pages (from-to) | 1227-1240 |
| Number of pages | 14 |
| Journal | Journal of Low Frequency Noise Vibration and Active Control |
| Volume | 40 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 2021 |
Keywords
- circular cracks
- critical speed
- hollow-shaft
- Rotor
- super-harmonic