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Investigation of the structural blade dynamics and aeroelastic behavior of the 7A rotor

Surrey, Stefan and Ortun, Biel and Truong, Khiem-Van and Wienke, Felix (2016) Investigation of the structural blade dynamics and aeroelastic behavior of the 7A rotor. In: American Helicopter Society 72nd Annual Forum. American Helicopter Society 72nd Annual Forum, 17.-19. Mai 2016, West Palm Beach, Florida.

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Deficits in rotor load prediction are often caused by inadequate modeling of structural blade dynamics. The elastic blade behavior needs to be validated as accurately as possible to predict rotor loads precisely. The structural blade dynamics of 1-D and 3-D finite element models in a multibody environment are investigated in terms of frequencies and aeroelastic behavior. Eigenfrequencies of the 1st torsion mode and the 4th flap mode of the reduced 3-D blade model exhibit a stronger coupling than the 1-D analysis prediction. The tightly coupled simulation with the advanced 1-D beam chain modeling approach is used to investigate the aeroelastic behavior of the 7A rotor in high-speed Forward flight. The potential of advanced rotor blade modeling in the multibody software SIMPACK in terms of rotor loads prediction is evaluated. In comparison to experimental data and the loose-coupling environment of ONERA (HOST-elsA), aerodynamical and structural loads are in good agreement. The characteristic 5/rev elastic torsion behavior of the 7A rotor blade has been captured leading to an improvement of the lift force prediction. The coupled SIMPACK-TAU predictions with an advanced 1-D beam model and the HOST-elsA results show a significant improvement over previous computations.

Item URL in elib:https://elib.dlr.de/110683/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of the structural blade dynamics and aeroelastic behavior of the 7A rotor
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wienke, FelixUNSPECIFIEDhttps://orcid.org/0000-0003-0081-1084UNSPECIFIED
Date:May 2016
Journal or Publication Title:American Helicopter Society 72nd Annual Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Aeroelastik, CFD-MKS
Event Title:American Helicopter Society 72nd Annual Forum
Event Location:West Palm Beach, Florida
Event Type:international Conference
Event Dates:17.-19. Mai 2016
Organizer:American Helicopter Society
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 (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Surrey, Stefan
Deposited On:13 Jan 2017 10:11
Last Modified:29 Mar 2023 00:31

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