RESEARCH PAPERS: Power: Structures and Dynamics

Balancing of Rotors Supported on Bearings Having Nonlinear Stiffness Characteristics

[+] Author and Article Information
A. Turpin

Engineering Department, Newfoundland and Labrador Hydro, St. John’s, Newfoundland, Canada

A. M. Sharan

Memorial University of Newfoundland, St. John’s, Newfoundland, Canada, A1B 3X5

J. Eng. Gas Turbines Power 116(3), 718-726 (Jul 01, 1994) (9 pages) doi:10.1115/1.2906878 History: Received November 18, 1981; Online April 24, 2008


In real-life applications, multi-disk-rotor systems are supported on bearings with nonlinear flexibility. The balancing of such systems at high speeds is a challenging task. This work presents a method of balancing such systems. The dynamic equations of motion for a nonlinear system are derived first using the influence coefficient method and then Lagrangian equations. An equivalent linear system is found using the optimization principles. Finally, the correct balance weights for the nonlinear system are obtained based on the equivalent linear system. The results thus obtained establish the utility of such a method of balancing nonlinear systems.

Copyright © 1994 by The American Society of Mechanical Engineers
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