Multi-material topology optimization of viscoelastically damped structures

21-26 August, Montreal, Canada

Conference paper (2016)

Authors

M. van der Kolk TNO, Computational Design and Mechanics - Mechanical, Maritime and Materials Engineering
G.J. van der Veen Computational Design and Mechanics - Mechanical, Maritime and Materials Engineering
Matthijs Langelaar Computational Design and Mechanics - Mechanical, Maritime and Materials Engineering
Research Group
Computational Design and Mechanics (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2016 M. van der Kolk, G.J. van der Veen, J de Vreugd, Matthijs Langelaar
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Published Date

2016

Language

English

Reuse Rights

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Precision and Microsystems Engineering

Research Group

Computational Design and Mechanics

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.