Modal Characterisation of Rotor/Propeller Rig for Tip-Mach Scaled Wind Tunnel Testing

Tatar, A., Wu, J., Zagaglia, D. , Titurus, B., Rezgui, D., Green, R. B. and Barakos, G. (2021) Modal Characterisation of Rotor/Propeller Rig for Tip-Mach Scaled Wind Tunnel Testing. 47th European Rotorcraft Forum, 07-09 Sep 2021.

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Abstract

An advanced rotor and propeller rig for tip Mach-scaled wind tunnel testing is the subject of dynamic analysis presented in this paper. Experimental modal analysis and finite element method are used to assess the key characteristics such as the modal properties and transfer functions, as well as their changes under varying conditions. This work aims to determine and summarize these characteristics for the purposes of further rig development and its safe operation. The research also includes analysis of the key sources of uncertainty, damping, the effect of unbalanced excitation and model-experiment correlation. The low frequency region is found to be dominated by the three weakly damped global modes whilst the following modes feature increased modal activity of the rotor shaft and the hub. The latter set of modes is also found to be more susceptible to nonlinear effects and associated increased identification and modelling uncertainty.

Item Type:Conference or Workshop Item
Additional Information:This research is part of MENTOR (Methods and Experiments for Novel Rotorcraft) project, which is funded by the Engineering and Physical Sciences Research Council (EPSRC) under Grant No. EP/S010378/1 and EP/S013814/1.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barakos, Professor George and Green, Dr Richard and Zagaglia, Dr Daniele
Authors: Tatar, A., Wu, J., Zagaglia, D., Titurus, B., Rezgui, D., Green, R. B., and Barakos, G.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in 47th European Rotorcraft Forum: 108
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
302201MENtOR: Methods and Experiments for NOvel RotorcraftGeorge BarakosEngineering and Physical Sciences Research Council (EPSRC)EP/S013814/1ENG - Aerospace Sciences