ESTIMATION OF NON-LINEAR STIFFNESS PARAMETERS OF ROLLING ELEMENT BEARINGS FROM RANDOM RESPONSE OF ROTOR-BEARING SYSTEMS

✍ Scribed by R. Tiwari; N.S. Vyas

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 496 KB
• Volume: 187
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1995.0517

✦ Synopsis

A technique for estimation of non-linear stiffness parameters of rolling element bearings in rotor systems, based on the analysis of the random response signals picked up from the bearing caps, is developed. The rotor-bearing system is modelled through the Fokker-Planck equation and the vibrations, resulting due to random imperfections of the bearing surfaces and assembly, are processed through a curve fitting algorithm to obtain the necessary bearing stiffness parameters. The technique has an advantage over existing ones in that it does not require an estimate of the excitation forces and works directly on the measured response signals of the system. The algorithm is illustrated for a laboratory rotor-bearing test rig and the results are compared with those obtained through an existing analytical model.