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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

An Adaptive Perturbation Scheme for the Analysis of Mistuned Bladed Disks

[+] Author and Article Information
C.-C. Lin

Ford Motor Company, Dearborn, MI

M. P. Mignolet

Dept. of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287-6106

J. Eng. Gas Turbines Power 119(1), 153-160 (Jan 01, 1997) (8 pages) doi:10.1115/1.2815540 History: Received March 01, 1995; Online November 19, 2007

Abstract

In this paper, a novel perturbation technique is introduced for the determination of the forced vibration response of mistuned bladed disks. The proposed technique is adaptive in the sense that the level of approximation can be varied at will to accommodate any specificities of the tuned system and/or of the existing mistuning. This versatility of the proposed approach not only guarantees the reliability of the computed response but also leads to an excellent compromise between accuracy and computational effort. Numerical results are presented that demonstrate both the reliability of the computed response and the computational saving obtained by relying on the suggested perturbation technique as opposed to a straightforward steady-state analysis.

Copyright © 1997 by The American Society of Mechanical Engineers
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