Multi-material topology optimization of viscoelastically damped structures

21-26 August, Montreal, Canada

Conference Paper (2016)
Authors

M. van der Kolk (TU Delft - Computational Design and Mechanics, TNO)

GJ van der Veen (TU Delft - Computational Design and Mechanics)

J de Vreugd (TNO)

M Langelaar (TU Delft - Computational Design and Mechanics)

Research Group
Computational Design and Mechanics
Copyright
© 2016 M. van der Kolk, G.J. van der Veen, J de Vreugd, Matthijs Langelaar
More Info
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Publication Year
2016
Language
English
Copyright
© 2016 M. van der Kolk, G.J. van der Veen, J de Vreugd, Matthijs Langelaar
Research Group
Computational Design and Mechanics
Pages (from-to)
1-2
Reuse Rights

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Abstract

The design of high performance instruments often involves the attenuation of poorly damped resonant modes. Current design methods typically rely on informed trial and error based modifications to improve dynamic performance. In this contribution, we present a multi-material topology optimization as an alternative, systematic methodology to design structures with optimized damping characteristics. A parametric, level set-based topology optimization is employed to simultaneously distribute structural and viscoelastic material to optimize the structure’s damping characteristics. To model the viscoelastic behavior a complex-valued material modulus is applied. The structural loss factor is determined from the complex-valued eigensolutions and its value is maximized during the optimization. We demonstrate the performance of the optimization by maximizing the damping of a cantilever beam.

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