FORWARD AND BACKWARD PRECESSION OF A VERTICAL ANISOTROPICALLY SUPPORTED ROTOR

✍ Scribed by A. Muszynska

• Book ID: 102975453
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 620 KB
• Volume: 192
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1996.0184

✦ Synopsis

This paper presents the analytical and experimental study of a vertical, overhung imbalanced rotor supported by flexible, anisotropic bearings. The results show that existence of imbalance and shaft bow causes the synchronous forced precession of the rotor to be forward (below the first value of split balance resonance and above the second value of the split balance resonance) or backward (between the two values of the split resonance). This phenomenon is classical. The new result consists of exploring the existence of forward precession of the inboard and midspan rotor sections while the outboard disk is precessing backward. The sensitivity analysis shows which system parameters are mainly responsible for this apparently bizarre phenomenon.