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Using Multibody Dynamics for the Stability Assessment of a New Rotor Test Rig

Arnold, Jürgen and Waitz, Stefan (2017) Using Multibody Dynamics for the Stability Assessment of a New Rotor Test Rig. In: ERF 2017 - Proceedings. ERF 2017 - 43rd European Rotorcraft Forum, 12.-15. Sep. 2017, Mailand, Italien.

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Abstract

The secure entry into service of a new rotor test rig requires the assessment of the dynamic and aeroelastic rotor stability. To this end, a multibody dynamics based numerical model was developed and coupled with an unsteady aerodynamic model based on Wagner's function and related enhancements for the general motion of an airfoil section considering heave and pitch motion. The simulation model uses modelling techniques for the setup of a linearized model and allows both, the investigation of ground resonance and flutter for the rig with clamped and articulated rotor blades in frequency domain. With respect to ground resonance, the dynamic examination of the two- and four-bladed rotor configurations shows a mechanically stable behaviour for the clamped and articulated rotor blades with lead-lag hinge in the planned rotor speed range up to 65 Hz. The aeroelastic assessment shows a damped behaviour for the configurations with clamped rotor blades, whilst the articulated rotor with lead-lag hinge is unstable beyond rotational speeds of 25 Hz for the two-bladed rotor and requires additional damping measures.

Item URL in elib:https://elib.dlr.de/115083/
Document Type:Conference or Workshop Item (Speech)
Title:Using Multibody Dynamics for the Stability Assessment of a New Rotor Test Rig
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Arnold, JürgenJuergen.Arnold (at) dlr.deUNSPECIFIED
Waitz, Stefanstefan.waitz (at) dlr.deUNSPECIFIED
Date:September 2017
Journal or Publication Title:ERF 2017 - Proceedings
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aeroelastik, Rotor Whirl, Bodenresonanz, Flatterstabilität, RTG
Event Title:ERF 2017 - 43rd European Rotorcraft Forum
Event Location:Mailand, Italien
Event Type:international Conference
Event Dates:12.-15. Sep. 2017
Organizer:Politecnico di Milano
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 Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aerolastic Simulation
Deposited By: Arnold, Dipl.-Ing. Jürgen
Deposited On:09 Nov 2017 10:03
Last Modified:06 Dec 2017 14:41

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