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Finite element optimization of viscoelastic damping applications

Gröhlich, Martin and Böswald, Marc and Winter, Rene (2020) Finite element optimization of viscoelastic damping applications. In: Proceedings of ISMA 2020 International Conference on Noise and Vibration Engineering, pp. 827-839. ISMA 2020 - International Conference on Noise and Vibration Engineering, 07.-09. Sep. 2020, Leuven, Belgien (Online-Konfernz). ISBN 9789082893113.

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Abstract

Lightweight design is an essential feature of aeronautic structures, yielding a considerable susceptibility to vibrations. While aircraft vibrations in the lower frequency range are safety-relevant, vibrations in the higher frequency range lead to an increased cabin interior noise and thus to reduced passenger comfort. An increase of structural damping is therefore highly beneficial but is directly connected to an undesired mass gain. Therefore, a general interest exists in a mass optimized vibration damping. This paper addresses the optimization of viscoelastic damping using the finite element method. In a parameter study it is shown that the width of the core and face layer of a Constrained Layer Damping treatment has a significant influence on the vibration damping. The width of those layers is therefore divided up into 40 parts and used as design variables in a restricted optimization. As a result, a geometry configuration is determined, aiming for maximum damping under a defined mass constraint.

Item URL in elib:https://elib.dlr.de/137409/
Document Type:Conference or Workshop Item (Speech)
Title:Finite element optimization of viscoelastic damping applications
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gröhlich, MartinMartin.Groehlich (at) dlr.deUNSPECIFIED
Böswald, MarcMarc.Boeswald (at) dlr.deUNSPECIFIED
Winter, ReneRene.Winter (at) dlr.deUNSPECIFIED
Date:November 2020
Journal or Publication Title:Proceedings of ISMA 2020 International Conference on Noise and Vibration Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 827-839
ISBN:9789082893113
Status:Published
Keywords:Viscoelasticity, damping design, damping optimization, constrained layer damping
Event Title:ISMA 2020 - International Conference on Noise and Vibration Engineering
Event Location:Leuven, Belgien (Online-Konfernz)
Event Type:international Conference
Event Dates:07.-09. Sep. 2020
Organizer:KU Leuven - Department of Mechanical Engineering
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 - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Gröhlich, Martin
Deposited On:24 Nov 2020 18:15
Last Modified:24 Nov 2020 18:15

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