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Analysis and simulation of structures with local visco-elastic damping from elastomers

Böswald, Marc and Gröhlich, Martin and Biedermann, Jörn and Winter, René (2018) Analysis and simulation of structures with local visco-elastic damping from elastomers. In: Proceedings of ISMA2018 International Conference on Noise and Vibration Engineering, pp. 1005-1021. ISMA 2018 - International Conference on Noise and Vibration Engineering, 17.-19. Sep. 2018, Leuven, Belgien. ISBN 9789073802995

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Abstract

In the design of lightweight structures, the construction of damping still is an unused design freedom. While material inherent damping of aluminum or composite materials is generally low, the internal damping of elastomers is significant. The basic concept of including local elastomer dampers into aluminum or composite components of aeronautic structures is addressed with the objective to increase the damping of specific vibration modes. The modelling from 1D rheological models of visco-elastic material up to 2D and 3D modelling using finite elements is addressed. Using the finite element method, a global damping matrix can be generated which enables forecasts of modal damping levels. A parameter study on a simple dynamic oscillator has been performed to better understand the influence of the parameters of visco-elastic material models. The experience gained on simple oscillators has been transferred towards damping design of a simple aluminum structure subjected to forced harmonic vibrations.

Item URL in elib:https://elib.dlr.de/123028/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis and simulation of structures with local visco-elastic damping from elastomers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Böswald, Marcmarc.boeswald (at) dlr.dehttps://orcid.org/0000-0001-8260-8623
Gröhlich, MartinMartin.Groehlich (at) dlr.deUNSPECIFIED
Biedermann, Jörnjoern.biedermann (at) dlr.deUNSPECIFIED
Winter, Renérene.winter (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:Proceedings of ISMA2018 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. 1005-1021
ISBN:9789073802995
Status:Published
Keywords:structural dynamics, visco elastic matererial, modelling of local damping, Prony-series
Event Title:ISMA 2018 - International Conference on Noise and Vibration Engineering
Event Location:Leuven, Belgien
Event Type:international Conference
Event Dates:17.-19. Sep. 2018
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
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Böswald, Dr.-Ing. Marc
Deposited On:22 Nov 2018 09:47
Last Modified:26 Nov 2018 14:53

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