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Methods for Refinement of Structural Finite Element Models: Summary of the GARTEUR AG14 Collaborative Programme

Hatch, C. and Skingle, G.W. and Greaves, C.H. and Lieven, N.A.J. and Coote, J.E. and Friswell, M.I. and Mottershead, J.E. and Shaverdi, H. and Mares, C. and McLaughlin, A. and Link, M. and Piet-Lahanier, N. and Van Houten, M.H. and Göge, D. and Rottmayr, H. (2006) Methods for Refinement of Structural Finite Element Models: Summary of the GARTEUR AG14 Collaborative Programme. In: Proceedings of the 32nd European Rotorcraft Forum (DY09). 32nd European Rotorcraft Forum, 2006, Maastricht, The Netherlands (Europe).

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Abstract

The finite element model is the main tool used by helicopter manufacturers for the analysis of helicopter structures and in particular for the prediction of vibration. High fidelity models that can accurately represent the structural dynamics are the key to producing effective low vibration designs. Helicopters with ‘jet’ smooth comfort are demanded by discriminating customers who also require ownership of vehicles with high reliability, low maintenance and reduced through life costs. The finite element model is an important tool in the assessment of aircraft modifications after the initial design and production when adverse vibration levels may become apparent. At this stage a structure is available and measured dynamic data from a shake test may be used to validate and improve the initial finite element model. The model derived from test data is not, by itself, comprehensive enough to allow the study and manipulation of the structural dynam-ics but its role in conjunction with the finite element model is a vital step towards improving the helicopter structural design. The main purpose of this GARTEUR collaboration was to explore methods and procedures for improving finite element models through the use of dynamic testing. For the foreseeable future it is expected that shake tests combined with finite element models will be the major tool for improving the dynamic characteristics of the helicopter structural design. It is there-fore of great importance to all participants that the procedure of validating and updating heli-copter finite element models is robust, rigorous and effective in delivering the best match based on realistic engineering adjustments to the finite element model. The industry need for finite element models, the variety of update procedures and their advan-tages are discussed in this paper together with some requirements for dynamic testing. The results of a systematic study on the model updating of a Lynx Mk7 airframe are presented and conclusions drawn. Recommendations are made with regard to performing subsequent dy-namic tests, model updating and for future collaborative study.

Item URL in elib:https://elib.dlr.de/45080/
Document Type:Conference or Workshop Item (Paper)
Title:Methods for Refinement of Structural Finite Element Models: Summary of the GARTEUR AG14 Collaborative Programme
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hatch, C.QinetiQ, Farnborough, UKUNSPECIFIED
Skingle, G.W.QinetiQ, Farnborough, UKUNSPECIFIED
Greaves, C.H.QinetiQ, Farnborough, UKUNSPECIFIED
Lieven, N.A.J.Bristol University, Bristol, UKUNSPECIFIED
Coote, J.E.Bristol University, Bristol, UKUNSPECIFIED
Friswell, M.I.Bristol University, Bristol, UKUNSPECIFIED
Mottershead, J.E.Liverpool University, Liverpool, UKUNSPECIFIED
Shaverdi, H.Liverpool University, Liverpool, UKUNSPECIFIED
Mares, C.Brunel University, London, UKUNSPECIFIED
McLaughlin, A.Westland Helicopters Ltd. ,Yeovil, UKUNSPECIFIED
Link, M.Kassel University, Kassel, GermanyUNSPECIFIED
Piet-Lahanier, N.ONERA, Chatillon, FranceUNSPECIFIED
Van Houten, M.H.NLR, Emmeloord, The NetherlandsUNSPECIFIED
Göge, D.DLR, Göttingen, GermanyUNSPECIFIED
Rottmayr, H.ECD, Munich, GermanyUNSPECIFIED
Date:2006
Journal or Publication Title:Proceedings of the 32nd European Rotorcraft Forum
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:structural dynamics, modal test, finite element model, model updating, vibration
Event Title:32nd European Rotorcraft Forum
Event Location:Maastricht, The Netherlands (Europe)
Event Type:international Conference
Event Dates:2006
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Active Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:20 Oct 2006
Last Modified:27 Apr 2009 13:09

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