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High-Resolution Vibration Measurement And Analysis Of The Flight-LAB Aircraft Fuselage Demonstrator

Winter, Rene and Biedermann, Jörn and Norambuena, Marco (2018) High-Resolution Vibration Measurement And Analysis Of The Flight-LAB Aircraft Fuselage Demonstrator. In: INTER-NOISE 2018. INTER-NOISE 2018 - 47th International Congress and Exposition on Noise Control Engineering, 26.-29. Aug. 2018, Chicago, IL (USA). ISBN 978-1-7325986-0-7

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Abstract

A challenge to the analysis of aircraft cabin vibrations regarding acoustic comfort is the identification of propagation paths along the structure. Knowing how mid-frequency vibrations travel through the fuselage allows for the development of simpler and more cost-effective counter measures to reduce cabin noise caused by harmonic sources such as the engines and the axillary power unit. The Acoustic Flight-LAB demonstrator is built closely and in full-scale after a real aircraft fuselage section. It is located in a semi-anechoic chamber providing perfect conditions for the acquisition of a high resolution mid-frequency range vibrational dataset suitable to further test and develop analysis methods otherwise only possible in small scale laboratory tests. An enormous effort was expended to measure and analyse the demonstrator's vibrational characteristics in the low- to mid-frequency range at 12000 measurement points. Besides an overview of the test campaign conducted to acquire the data, the results of an operational deflection shape (ODS) synthesis based on principal component analysis (PCA) are presented alongside energy transfer paths calculated using a novel hybrid Numerical-Experimental approach to structural intensity (STI) analysis using aforementioned deflection shapes.

Item URL in elib:https://elib.dlr.de/122597/
Document Type:Conference or Workshop Item (Speech)
Title:High-Resolution Vibration Measurement And Analysis Of The Flight-LAB Aircraft Fuselage Demonstrator
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Winter, ReneRene.Winter (at) dlr.dehttps://orcid.org/0000-0003-2115-4001
Biedermann, Jörnjoern.biedermann (at) dlr.deUNSPECIFIED
Norambuena, MarcoMarco.Norambuena (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:INTER-NOISE 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
ISBN:978-1-7325986-0-7
Status:Published
Keywords:structural intensity analysis, vibration analysis, principle component analysis
Event Title:INTER-NOISE 2018 - 47th International Congress and Exposition on Noise Control Engineering
Event Location:Chicago, IL (USA)
Event Type:international Conference
Event Dates:26.-29. Aug. 2018
Organizer:i-ince - Institute of Noise Control Engineering
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 - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Winter, Rene
Deposited On:21 Nov 2018 10:16
Last Modified:21 Nov 2018 10:16

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