A study of the influence of bearing clearance on lateral coupled shaft/disk rotordynamics

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Journal of Engineering for Gas Turbines and Power; (United States)

DOI:https://doi.org/10.1115/1.2906706· OSTI ID:6505189

Flowers, G T; Wu, Fang Sheng ^[1]

---

1. Auburn Univ., AL (United States)

This study examines the influence of bearing clearance on the dynamic behavior of a rotating, flexible disk/shaft system. Most previous work in nonlinear rotordynamics has tended to concentrate separately on shaft vibration or on bladed disk vibration, neglecting the coupling dynamics between them. The current work examines the important rotordynamic behavior of coupled disk/shaft dynamics. A simplified nonlinear model is developed for lateral vibration of a rotor system with a bearing clearance nonlinearity. The steady-state dynamic behavior of this system is explored using numerical simulation and limit cycle analysis. It is demonstrated that bearing clearance effects can produce superharmonic vibration that may serve to excite high-amplitude disk vibration. Such vibration could lead to significantly increased bearing loads and catastrophic failure of blades and disks. In addition, multivalued responses and a periodic behavior were observed.

• OSTI ID: 6505189
• Journal Information: Journal of Engineering for Gas Turbines and Power; (United States), Vol. 115:2; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
TURBOMACHINERY
BEARINGS
MECHANICAL VIBRATIONS
SYSTEMS ANALYSIS
AVAILABILITY
CRITICAL VELOCITY
MATHEMATICAL MODELS
MECHANICAL SHAFTS
PARAMETRIC ANALYSIS
PERFORMANCE
ROTORS
EQUIPMENT
MACHINE PARTS
MACHINERY
SHAFTS
VELOCITY
200104* - Fossil-Fueled Power Plants- Components