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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Statistics of Response of a Mistuned Bladed Disk Assembly Subjected to White Noise and Narrow Band Excitation

[+] Author and Article Information
D. Cha, A. Sinha

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802

J. Eng. Gas Turbines Power 121(4), 710-717 (Oct 01, 1999) (8 pages) doi:10.1115/1.2818531 History: Received March 22, 1998; Revised March 23, 1999; Online December 03, 2007

Abstract

This paper deals with the statistics of the response of a mistuned bladed disk assembly subjected to random excitation. Analytical techniques are developed to compute this statistics for two types of random excitation: white noise and narrow band. The validity of the analytical methods has been established by comparison with the results from numerical simulations. The sensitivities of the response to mistuning have been examined as a function of the width of the frequency band of the random excitation, the dominant frequency of the random excitation and the structural coupling between adjacent blades.

Copyright © 1999 by The American Society of Mechanical Engineers
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