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Control of the sound radiation of grid panels with active-passive-hybrid methods

Misol, Malte and Titze, Maik and Monner, Hans Peter (2017) Control of the sound radiation of grid panels with active-passive-hybrid methods. In: SFB 880 - Fundamentals of high-lift for future commercial aircraft, Biennial Report Technische Universität Braunschweig. pp. 197-205. ISBN 9783928628907.

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Abstract

The present work deals with the acoustic properties of grid-stiffened aircraft fuselage panels. It aims at the development of passive and active-passive-hybrid (APH) acoustic treatments to improve the low-frequency sound transmission loss of these grid panels. The idea is to exploit the geometric and dynamic properties of grid panels to improve the efficiency of the acoustic treatments. The work is subdivided in several tasks. It starts with the definition and manufacturing of an aircraft relevant test specimen. A laboratory setup is build in a semi-anechoic room which permits a proper mounting, excitation and measurement of the grid panel. A finite element model of the panel is developed and validated by means of experimental modal analysis. An aircraft relevant load case is defined and implemented. For this, a synthesis of the structural vibration induced by a turbulent boundary layer is realized by using a number of loudspeakers. Based on this work, the passive and APH acoustic treatments will be developed and implemented in the sequel of the project.

Item URL in elib:https://elib.dlr.de/115741/
Document Type:Contribution to a Collection
Title:Control of the sound radiation of grid panels with active-passive-hybrid methods
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Misol, MalteUNSPECIFIEDhttps://orcid.org/0000-0001-8056-1569
Titze, MaikUNSPECIFIEDUNSPECIFIED
Monner, Hans PeterUNSPECIFIEDhttps://orcid.org/0000-0002-5897-2422
Date:2017
Journal or Publication Title:SFB 880 - Fundamentals of high-lift for future commercial aircraft, Biennial Report
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 197-205
Editors:
EditorsEmailEditor's ORCID iD
Radespiel, RolfTU BraunschweigUNSPECIFIED
Semaan, RichardTU BraunschweigUNSPECIFIED
Publisher:Technische Universität Braunschweig
ISBN:9783928628907
Status:Published
Keywords:aircraft, grid panel, acoustic control, passive, active, hybrid
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 - Structures and Materials (old), L - Simulation and Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Misol, Dr. Malte
Deposited On:23 Nov 2017 14:43
Last Modified:31 Jul 2019 20:13

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