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Multibody analysis of whirl flutter stability on a tiltrotor wind tunnel model

Krüger, Wolf R. (2015) Multibody analysis of whirl flutter stability on a tiltrotor wind tunnel model. Proceedings of the Institution of Mechanical Engineers Part K: Journal of Multi-body Dynamics. SAGE Publications. doi: 10.1177/1464419315582128. ISSN 1464-4193.

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Official URL: http://pik.sagepub.com/content/early/2015/05/07/1464419315582128.full.pdf+html


Tiltrotor aircraft are equipped with large rotors, usually driven by heavy engines in nacelles located at the tip of the wings. This combination of large rotors and high masses on wings which form a relatively elastic support makes whirl flutter a critical phenomenon for the design of the aircraft and its performance. In this article, a multibody-based simulation model of a tiltrotor wind tunnel model is presented, combining a mixed finite element/multibody representation of the support, a detailed kinematic model of the rotor hub and a strip-wise definition of air loads on the blades. Investigations on the effect of parameter changes and on-linearities on the calculation of the aeroelastic stability boundary are executed. The selected operational points are taken from wind tunnel experiments performed by a consortium of partners in the course of the European ADYN project. The regarded wind tunnel model is a half model of a tiltrotor wing, simplified for the use in whirl flutter investigations. The rotor is four-bladed; the rotor hub is of a gimbal type. Structural dynamics properties of the model are known from detailed experimental investigations. Numerical analyses of the dynamic behaviour of the model are performed in the frequency and in the time domain. Results show considerable differences for linear and non-linear models. This paper describes the simulation approach, the model setup and the comparison of the data with selected experimental results.

Item URL in elib:https://elib.dlr.de/96900/
Document Type:Article
Additional Information:Online-first publication; publication in print is in preparation
Title:Multibody analysis of whirl flutter stability on a tiltrotor wind tunnel model
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Krüger, Wolf R.UNSPECIFIEDhttps://orcid.org/0000-0002-7949-1169UNSPECIFIED
Journal or Publication Title:Proceedings of the Institution of Mechanical Engineers Part K: Journal of Multi-body Dynamics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:SAGE Publications
Keywords:Whirl-Flutter, Tiltrotor, Multibody simulation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Institute of Aeroelasticity > Aeroelastic Simulations
Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Krüger, Prof. Dr.-Ing. Wolf R.
Deposited On:03 Jul 2015 09:14
Last Modified:06 Nov 2023 13:57

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