NDLI: Maximum Unbalance Responses of a Gear-Coupled Two-Shaft Rotor-Bearing System

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Lee, An Sung Ha, Jin Woong
Copyright Year	2003
Abstract	A general method is presented for obtaining the unbalance response orbit of a gear-coupled two-shaft rotor-bearing system, based on the finite element approach. Specifically, analytical solutions of the maximum and minimum radii of the orbit are proposed. The method has been applied to the unbalance response analysis of a 600 kW turbo-chiller rotor-bearing system, having a bull-pinion speed increasing gear. Bumps in the unbalance responses have been observed at the first torsional natural frequency because of the coupling between the lateral and torsional dynamics due to gear meshing. In addition, the analytical solutions have been validated with results obtained by a full numerical approach. The proposed method can be generally applied to an analysis of the unbalance response orbits of dual-shaft rotor-bearing systems coupled by bearings as well, which are often found in aerospace gas turbine engines.
Sponsorship	International Gas Turbine Institute
Starting Page	473
Ending Page	480
Page Count	8
File Format	PDF
ISBN	0791836878
DOI	10.1115/GT2003-38146
e-ISBN	0791836711
Volume Number	Volume 4: Turbo Expo 2003
Conference Proceedings	ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
Language	English
Publisher Date	2003-06-16
Publisher Place	Atlanta, Georgia, USA
Access Restriction	Subscribed
Subject Keyword	Gears Gas turbines Bearings Dynamics (mechanics) Rotors Turbochargers Finite element analysis Aerospace industry
Content Type	Text
Resource Type	Article

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