Experimental Monte Carlo mistuning assessment of bladed disk vibration using forcing variations

Jia Li, Matthew P. Castanier, Christophe Pierre, Steven L. Ceccio

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

It is known that the vibration response of bladed disks in turbine engine rotors can be extremely sensitive to small, random blade-to-blade variations, or mistuning. However, it is cumbersome to assess the effects of random mistuning or validate numerical predictions for a population of mistuned bladed disks using experimental methods. In this work, as an alternative approach for performing vibration testing of many mistuning patterns, it is proposed that varying the external forcing function provided to the blades can be used to mimic the influence of structural blade property mistuning on the vibration response. Because it is much easier and more efficient to vary the external excitation than to physically alter the blades, this opens the possibility of running an experimental analog of a Monte Carlo simulation. This approach, referred to as an experimental Monte Carlo mistuning assessment, is explored and validated by comparing simulations and test data for a 24-bladed disk. The experimental Monte Carlo results are found to have excellent agreement with numerical Monte Carlo simulation results for a case of small standard deviation of mistuning.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Subtitle of host publication14th AIAA/ASME/AHS Adaptive Structures Conference, 8th AIAA Non-deterministic App
Pages4540-4548
Number of pages9
DOIs
StatePublished - 2006
Event47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Newport, RI, United States
Duration: 1 May 20064 May 2006

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume7
ISSN (Print)0273-4508

Conference

Conference47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Country/TerritoryUnited States
CityNewport, RI
Period1/05/064/05/06

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