In a rotor-bearing system, there are usually some under- or unmodeled dynamic components that are considered frequency dependent, such as foundations, bearings, and seals. This paper presents a method to identify the dynamic behavior of these components using an otherwise accurate engineering model of the system in combination with available measurements of system frequency response functions. The approach permits treatment of flexible rotors and allows that the system test excitations and measurement sensors are not collocated. Because all engineering models contain some residual error and all measurements incorporate an element of noise or uncertainty, the quality of the identified parameters must be estimated. This paper introduces application of analysis to solve this problem, resulting in acceptable solution time and hard guarantees of solution reliability. Two illustrative examples are provided, showing that the presented approach is an efficient method to identify and bound these parameters.
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e-mail: ehm7s@virginia.edu
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July 2006
Technical Papers
Identification of Frequency-Dependent Parameters in a Flexible Rotor System
Qingyu Wang,
Qingyu Wang
Department of Mechanical and Aerospace Engineering,
e-mail: qw4k@virginia.edu
University of Virginia
, ROMAC Laboratories, 122 Engineer’s Way, Charlottesville, VA 22904
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Eric H. Maslen
Eric H. Maslen
Department of Mechanical and Aerospace Engineering,
e-mail: ehm7s@virginia.edu
University of Virginia
, ROMAC Laboratories, 122 Engineer’s Way, Charlottesville, VA 22904
Search for other works by this author on:
Qingyu Wang
Department of Mechanical and Aerospace Engineering,
University of Virginia
, ROMAC Laboratories, 122 Engineer’s Way, Charlottesville, VA 22904e-mail: qw4k@virginia.edu
Eric H. Maslen
Department of Mechanical and Aerospace Engineering,
University of Virginia
, ROMAC Laboratories, 122 Engineer’s Way, Charlottesville, VA 22904e-mail: ehm7s@virginia.edu
J. Eng. Gas Turbines Power. Jul 2006, 128(3): 670-676 (7 pages)
Published Online: September 28, 2005
Article history
Received:
August 25, 2005
Revised:
September 28, 2005
Citation
Wang, Q., and Maslen, E. H. (September 28, 2005). "Identification of Frequency-Dependent Parameters in a Flexible Rotor System." ASME. J. Eng. Gas Turbines Power. July 2006; 128(3): 670–676. https://doi.org/10.1115/1.2135814
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