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Dynamic characterization of the A400M acoustics fuselage demonstrator

Winter, René and Biedermann, Jörn and Böswald, Marc and Wandel, Martin (2016) Dynamic characterization of the A400M acoustics fuselage demonstrator. Inter-Noise 2016, 21.-24. Aug. 2016, Hamburg, Deutschland.

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Turboprop engines generate vibrations in the mid frequency range which are transmitted as structure-born sound to an aircraft fuselage. There it is radiated into the cabin as noise. To manage the acoustic impact validated simulation models and analysis methods are necessary. The A400M Acoustic Fuselage Demon- strator, a full scale aircraft fuselage, was used to develop test methods providing the validation data needed. The mid frequency range provides great challenges for such tests: To expand the well-established method of experimental modal analysis (EMA) into higher frequencies a very large number of measurement points is necessary. To ensure high quality results testing procedures from ground vibration tests (GVT) were adapted to the mid frequency range. The resulting sensor grid is a mixture of an optimized sensor distribution for low frequency analysis and a high density grid in the propeller plane of the A400M. To measure the approx- imately 2800 sensor positions a roving sensor method was used. Using several sensors permanently fixed to the structure the overall consistency of the data was analyzed. The methods presented here were able to provide high quality data used in later works for both model updating and method validation

Item URL in elib:https://elib.dlr.de/105940/
Document Type:Conference or Workshop Item (Speech)
Title:Dynamic characterization of the A400M acoustics fuselage demonstrator
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Winter, Renérene.winter (at) dlr.deUNSPECIFIED
Biedermann, Jörnjoern.biedermann (at) dlr.deUNSPECIFIED
Böswald, Marcmarc.boeswald (at) dlr.deUNSPECIFIED
Wandel, Martinmartin.wandel (at) airbus.comUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 3296-3306
Keywords:modal analysis, vibro-acoustic testing
Event Title:Inter-Noise 2016
Event Location:Hamburg, Deutschland
Event Type:international Conference
Event Dates:21.-24. Aug. 2016
Organizer:Technische Universität Hamburg-Harburg, TUHH / Deutsche Gesellschaft für Akustik, DEGA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Grischke, Birgid
Deposited On:18 Nov 2016 14:51
Last Modified:18 Nov 2016 14:51

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