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A hybrid numerical and experimental approach for structural intensity analysis of stiffened lightweight structures

Biedermann, Jörn and Winter, Rene and Norambuena, Marco and Böswald, Marc (2018) A hybrid numerical and experimental approach for structural intensity analysis of stiffened lightweight structures. In: Proceedings of ISMA2018 International Conference on Noise and Vibration Engineering, pp. 4101-4115. ISMA 2018 - International Conference on Noise and Vibration Engineering, 17.-19. Sep. 2018, Leuven, Belgien. ISBN 9789073802995

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Abstract

Aircrafts are lightweight structures and as such they are prone to vibrations, which malre them susceptible to structure-borne noise. Especially, engine induced vibration and their transmission as structure-borne noise towards the aircraft cabin are of interest. In order to implement optimal noise treatments for cabin comfort improvement it is essential to identify the transfer path from the engines through the wings and fuselage into the cabin. On the numerical side Structural Intensity Analysis is a established method to identify the energy transfer paths. With the help of Finite Element models, rather complex structures can be investigated because detailed mathematical models are provided. In this paper a hybrid method is proposed in order to estimate the energy transfer paths of complex structures using experimental response data obtained from a laboratory structure and a full-sized aircraft fuselage. This method combines experimentally determined velocities and numerical methods known from the Finite Element Analysis.

Item URL in elib:https://elib.dlr.de/121778/
Document Type:Conference or Workshop Item (Speech)
Title:A hybrid numerical and experimental approach for structural intensity analysis of stiffened lightweight structures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Biedermann, Jörnjoern.biedermann (at) dlr.deUNSPECIFIED
Winter, ReneRene.Winter (at) dlr.deUNSPECIFIED
Norambuena, MarcoMarco.Norambuena (at) dlr.deUNSPECIFIED
Böswald, MarcMarc.Boeswald (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:Proceedings of ISMA2018 International Conference on Noise and Vibration Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 4101-4115
ISBN:9789073802995
Status:Published
Keywords:lightweight structures, numerical, aircraft cabin, hybrid method, Finite Element Analysis
Event Title:ISMA 2018 - International Conference on Noise and Vibration Engineering
Event Location:Leuven, Belgien
Event Type:international Conference
Event Dates:17.-19. Sep. 2018
Organizer:KU Leuven - Department of Mechanical 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: Grischke, Birgid
Deposited On:15 Oct 2018 11:16
Last Modified:26 Nov 2018 14:56

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