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Acoustic design of boundary segments in aircraft fuselages using topology optimization and a specialized acoustic pressure function

Radestock, Martin and Rose, Michael and Monner, Hans Peter (2017) Acoustic design of boundary segments in aircraft fuselages using topology optimization and a specialized acoustic pressure function. In: Proceedings of SPIE (10164). SPIE 2017, 25.-29. Mrz. 2017, Portland, Oregon/USA.

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Abstract

In most aviation applications, a major cost benefit can be achieved by a reduction of the system weight. Often the acoustic properties of the fuselage structure are not in the focus of the primary design process, too. A final correction of poor acoustic properties is usually done using insulation mats in the chamber between the primary and secondary shell. It is plausible that a more sophisticated material distribution in that area can result in a substantially reduced weight. Topology optimization is a well-known approach to reduce material of compliant structures. In this paper an adaption of this method to acoustic problems is investigated. The gap full of insulation mats is suitably parameterized to achieve different material distributions. To find advantageous configurations, the objective in the underlying topology optimization is chosen to obtain good acoustic pressure patterns in the aircraft cabin. An important task in the optimization is an adequate Finite Element model of the system. This can usually not be obtained from commercially available programs due to the lack of special sensitivity data with respect to the design parameters. Therefore an appropriate implementation of the algorithm has been done, exploiting the vector and matrix capabilities in the MATLAB environment. Finally some new aspects of the Finite Element implementation will also be presented, since they are interesting on its own and can be generalized to efficiently solve other partial differential equations as well.

Item URL in elib:https://elib.dlr.de/111779/
Document Type:Conference or Workshop Item (Speech)
Title:Acoustic design of boundary segments in aircraft fuselages using topology optimization and a specialized acoustic pressure function
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Radestock, MartinMartin.Radestock (at) dlr.dehttps://orcid.org/0000-0002-9918-3315
Rose, Michaelmichael.rose (at) dlr.deUNSPECIFIED
Monner, Hans Peterhans.monner (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:Proceedings of SPIE
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Status:Published
Keywords:topology optimization, acoustic design
Event Title:SPIE 2017
Event Location:Portland, Oregon/USA
Event Type:international Conference
Event Dates:25.-29. Mrz. 2017
Organizer:SPIE International Office
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Air Traffic Concepts and Operation
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Rose, Dr.rer.nat. Michael
Deposited On:03 Apr 2017 07:28
Last Modified:29 Jan 2020 13:15

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