International Journal of Rotating Machinery

International Journal of Rotating Machinery / 2007 / Article

Research Article | Open Access

Volume 2007 |Article ID 027247 | https://doi.org/10.1155/2007/27247

J. Gallego-Garrido, G. Dimitriadis, J. R. Wright, "A Class of Methods for the Analysis of Blade Tip Timing Data from Bladed Assemblies Undergoing Simultaneous Resonances—Part I: Theoretical Development", International Journal of Rotating Machinery, vol. 2007, Article ID 027247, 11 pages, 2007. https://doi.org/10.1155/2007/27247

A Class of Methods for the Analysis of Blade Tip Timing Data from Bladed Assemblies Undergoing Simultaneous Resonances—Part I: Theoretical Development

Academic Editor: Eric Maslen
Received06 Mar 2006
Revised17 Nov 2006
Accepted04 Jan 2007
Published08 Mar 2007

Abstract

Blade tip timing is a technique for the measurement of vibrations in rotating bladed assemblies. Although the fundamentals of the technique are simple, the analysis of data obtained in the presence of simultaneously occurring synchronous resonances is problematic. A class of autoregressive-based methods for the analysis of blade tip timing data from assemblies undergoing two simultaneous resonances has been developed. It includes approaches that assume both sinusoidal and general blade tip responses. The methods can handle both synchronous and asynchronous resonances. An exhaustive evaluation of the approaches was performed on simulated data in order to determine their accuracy and sensitivity. One of the techniques was found to perform best on asynchronous resonances and one on synchronous resonances. Both methods yielded very accurate vibration frequency estimates under all conditions of interest.

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Copyright © 2007 J. Gallego-Garrido et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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