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Energy based correlation criteria in the mid-frequency range

Biedermann, Jörn und Winter, René und Wandel, Martin und Böswald, Marc (2017) Energy based correlation criteria in the mid-frequency range. Journal of Sound and Vibration, 400, Seiten 457-480. Elsevier. doi: 10.1016/j.jsv.2017.04.024. ISSN 0022-460X.

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Kurzfassung

Aircraft structures are characterized by their lightweight design. As such, they are prone to vibrations. Numerical models based on the Finite Element Method often show significant deviations when the mid-frequency range is considered, where strong interaction be- tween vibrations and acoustics is present. Model validation based on experimental modal data is often not possible due to the high modal density that aircraft fuselage structures exhibit in this frequency range. Classical correlation criteria like the Modal Assurance Criterion require mode shapes and can therefore not be applied. Other correlation criteria using frequency response data, such as the Frequency Domain Assurance Criterion, are highly sensitive to even small structural modifications and fail to indicated the correlation between test and analysis data in the mid-frequency range. Nevertheless, validated nu- merical models for the mid- to high-frequency ranges are a prerequisite for acoustic comfort predictions of aircraft cabin. This paper presents a new method for the correlation of response data from test and analysis in the mid-frequency range to support model validation in the mid-frequency range and to enable the usage of finite element models in this frequency range. The method is validated on a stiffened cylindrical shell structure, which represents a scale-model of an aircraft fuselage. The correlation criterion presented here is inspired by Statistical Energy Analysis and is based on kinetic energies integrated over frequency bands and spatially integrated over surface areas of the structure. The objective is to indicate frequency bands where the finite element model needs to be adjusted to better match with experimental observations and to locate the areas where these adjustments should be applied.

elib-URL des Eintrags:https://elib.dlr.de/113571/
Dokumentart:Zeitschriftenbeitrag
Titel:Energy based correlation criteria in the mid-frequency range
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Biedermann, Jörnjoern.biedermann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Winter, Renérene.winter (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wandel, Martinmartin.wandel (at) airbus.comNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Böswald, Marcmarc.boeswald (at) dlr.dehttps://orcid.org/0000-0001-8260-8623NICHT SPEZIFIZIERT
Datum:2017
Erschienen in:Journal of Sound and Vibration
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:400
DOI:10.1016/j.jsv.2017.04.024
Seitenbereich:Seiten 457-480
Verlag:Elsevier
ISSN:0022-460X
Status:veröffentlicht
Stichwörter:structural dynamics, vibroacoustics, numerical & experimental model correlation, kinetic energy distribution, mid-, high-frequency range, high spatial resolution measurements, model validation, model updating
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Flugphysik (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Strukturdynamik und aeroelastische Systemidentifikation
Hinterlegt von: Grischke, Birgid
Hinterlegt am:25 Sep 2017 08:56
Letzte Änderung:08 Nov 2023 15:14

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