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Experimentelle Untersuchung einer Platte und einer einfachen Doppelschale mit applizierten Dämpfungspaketen

Hölscher, Bernd-Christian and Haase, Thomas (2014) Experimentelle Untersuchung einer Platte und einer einfachen Doppelschale mit applizierten Dämpfungspaketen. Other. DLR-Interner Bericht. DLR-IB 131-2014/20, 84 S. (Unpublished)

Full text not available from this repository.

Abstract

For active control purposes a double wall structure enables the measurement of a time advanced reference signal for a feedforward system because the reference signal can be measured at the primary panel and the control system can be applied to the second panel. In aerospace engineering these double wall sections are often filled with absorbent materials. These materials have an influence on the structural dynamics of the double wall section. In order to guarantee the function of the feedforward control system the damped double wall section has to show a linear system behavior. In order to analyze the linearity of double wall panels with different absorbent materials this study experimentally investigates different damping concepts on a simple double wall structure. The double wall structure is a buildup with two 0.8 x 0.6 m² aluminum plates and different damping concepts are applied to the cavity between. The absorbent material is added to the secondary panel where glass wool in different configurations or constraint layer damping is applied. The linear system behavior up to 500 Hz can be verified with the coherence function for all concepts. Above 500 Hz it can be shown that the test set-up has a substantial effect on the dynamics of the double wall section.

Item URL in elib:https://elib.dlr.de/95067/
Document Type:Monograph (DLR-Interner Bericht, Other)
Title:Experimentelle Untersuchung einer Platte und einer einfachen Doppelschale mit applizierten Dämpfungspaketen
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hölscher, Bernd-ChristianTU BraunschweigUNSPECIFIED
Haase, ThomasUNSPECIFIEDUNSPECIFIED
Date:October 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:84
Status:Unpublished
Keywords:double wall, damped cavity, coherence
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 Quiet und Comfortable Rotorcraft, L - Systems and Cabin
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Böhringer-Thelen, Isolde
Deposited On:02 Mar 2015 08:05
Last Modified:02 Mar 2015 08:05

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