2023 • In Structures and Dynamics - Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration
BLISK; experimental; Mistuning; Electrodynamics shakers; Experimental; Experimental system; Identification method; Measurements of; Mode shapes; System mode; Test rigs; Engineering (all)
Abstract :
[en] This paper presents an autonomous mistuning identification method for single BLISKs. The proposed methodology relies on the ICMM identification methodology. The required inputs are obtained thanks to measurements of the system mode shapes and natural frequencies carried out with a dedicated test rig. The BLISK is excited by an electrodynamic shaker. An infrared Laser Doppler Vibrometer attached to a robotic arm is used to perform the measurements on the blades. The use of a robotic arm enables the reduction of human interventions and significantly limits the positioning error which increases the accuracy of the identification. The proposed setup thus permits to perform repeated characterization campaign, to increase the number of measurements with low human resources cost, and to perform 3D modal analysis. This opportunity makes the test bench suitable for next generation of engines which are composed of one-piece multi-stages compressor, the Bladed druM (BluM). Indeed, the overlay of the blades could reduce the accessibility of vertical measurement. In this work, the proposed method is firstly presented. The robust experimental input data selection procedure which has been developed and which allows for the optimization of the mistuning identification is then described. This procedure reduces the sensitivity of the result with respect to bad experimental content. At last, the usefulness of the method is demonstrated on the 1B and 1T mistuning evaluation of an industrial BLISK.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Denis, Sophie; V2i, Liège, Belgium
Hoffait, Sébastien ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Mechanical aspects of turbomachinery and aerospace propulsion ; V2i, Liège, Belgium
Ligot, Jérôme; V2i, Liège, Belgium
de Cazenove, Jean; Cenaero, Liège, Belgium
Salles, Loïc ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Mechanical aspects of turbomachinery and aerospace propulsion
Language :
English
Title :
IMPROVEMENT AND VALIDATION OF AN AUTONOMOUS EXPERIMENTAL SYSTEM TO IDENTIFY BLISK MISTUNING
Structures and Dynamics - Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration
Wallonia ERDF - European Regional Development Fund
Funding number :
"WINGS" contract N°8441; VIBE contract N°1910246.
Funding text :
The present work is carried out in the framework of the "WINGS" project funded by Wallonia under contract N°8441. This work is the follow-up of a research carried out in the framework of the Coopilot "VIBE" project funded by Wallonia and the European Regional Development Fund under contract N°1910246. We would like to thank Safran Aero Boosters to make available a BLISK for the purpose of this work.The present work is carried out in the framework of the "WINGS" project funded by Wallonia under contract N°8441. This work is the follow-up of a research carried out in the framework of the Coopilot "VIBE" project funded by Wallonia and the European Regional Development Fund under contract N°1910246.
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