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Active control of composite fuselage type structures with enclosed acoustic cavity

Hesse, Christian (2018) Active control of composite fuselage type structures with enclosed acoustic cavity. Journal of Fluids and Structures, 81, pp. 565-573. Elsevier. DOI: https://doi.org/10.1016/j.jfluidstructs.2018.06.006 ISSN 0889-9746

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Official URL: https://www.sciencedirect.com/science/article/pii/S0889974617305455

Abstract

An active structural acoustic control system for a composite fuselage type structure is developed in this paper. The focus of the active control system is the global reduction of the sound field in an enclosed acoustic cavity using structure-integrated sensors and actuators. Active structural acoustic control systems are commonly designed based on the acoustic radiation modes which diagonalize a radiation operator. In the case of interior sound radiation, this radiation operator is derived in this paper from the coupled acoustic modes, which take into account the boundary conditions of the coupled velocity from the fuselage type structure. This results in frequency-independent radiation modes which do not rely on the validity of the modal interaction approach. The latter one violates the continuity condition of the velocity along the coupling surface. Parameter studies regarding active control implementations are conducted in order to evaluate how many radiation modes need to be considered for achieving a global sound attenuation.

Item URL in elib:https://elib.dlr.de/120578/
Document Type:Article
Title:Active control of composite fuselage type structures with enclosed acoustic cavity
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hesse, ChristianChristian.Hesse (at) dlr.dehttps://orcid.org/0000-0002-9456-5277
Date:August 2018
Journal or Publication Title:Journal of Fluids and Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:81
DOI :https://doi.org/10.1016/j.jfluidstructs.2018.06.006
Page Range:pp. 565-573
Publisher:Elsevier
ISSN:0889-9746
Status:Published
Keywords:Active control, ASAC, Radiation Modes, Fluid-structure interaction
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 - Systems and Cabin
Location: Hamburg
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Hesse, Dr. Christian
Deposited On:25 Jun 2018 06:36
Last Modified:25 Jun 2018 06:36

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