A practical multiscale approach for optimization of structural damping

Erik Andreassen; Jakob Søndergaard Jensen

doi:10.1007/s00158-015-1326-9

A practical multiscale approach for optimization of structural damping

Erik Andreassen, Jakob Søndergaard Jensen

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Abstract

A simple and practical multiscale approach suitable for topology optimization of structural damping in a component ready for additive manufacturing is presented.The approach consists of two steps: First, the homogenized loss factor of a two-phase material is maximized. This is done in order to obtain a range of isotropic microstructures that have a connected stiff material phase. Second,the structural damping of the component is maximized using material interpolations based on the homogenized properties of the microstructures. In order to achieve convergence towards a discrete set of material phases in the macroscopic problem, a material interpolation that favors values close to the predefined material densities is introduced.

Original language	English
Journal	Structural and Multidisciplinary Optimization
Volume	53
Issue number	2
Pages (from-to)	215-224
ISSN	1615-147X
DOIs	https://doi.org/10.1007/s00158-015-1326-9
Publication status	Published - 2016

Keywords

Damping
Microstructure
Topology optimization
Homogenization
Multiscale
Additive manufacturing

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AB - A simple and practical multiscale approach suitable for topology optimization of structural damping in a component ready for additive manufacturing is presented.The approach consists of two steps: First, the homogenized loss factor of a two-phase material is maximized. This is done in order to obtain a range of isotropic microstructures that have a connected stiff material phase. Second,the structural damping of the component is maximized using material interpolations based on the homogenized properties of the microstructures. In order to achieve convergence towards a discrete set of material phases in the macroscopic problem, a material interpolation that favors values close to the predefined material densities is introduced.

KW - Damping

KW - Microstructure

KW - Topology optimization

KW - Homogenization

KW - Multiscale

KW - Additive manufacturing

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JO - Structural and Multidisciplinary Optimization

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ER -

A practical multiscale approach for optimization of structural damping

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