Multi-material topology optimization of viscoelastically damped structures

Multi-material topology optimization of viscoelastically damped structures: 21-26 August, Montreal, Canada

van der Kolk, M. (TU Delft Computational Design and Mechanics; TNO)
van der Veen, G.J. (TU Delft Computational Design and Mechanics)
de Vreugd, J (TNO)
Langelaar, Matthijs (TU Delft Computational Design and Mechanics)

Floryan, J.M. (editor)
Tvergaard, V. (editor)
van Campen, D. (editor)

2016

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.

http://resolver.tudelft.nl/uuid:602300a2-841e-410c-9249-4a5cdc1780fa

Proceedings of the 24th International Congress of Theoretical and Applied Mechanics

24th International Congress of Theoretical and Applied Mechanics (ICTAM), 2016-08-21 → 2016-08-26, Montreal, Canada

Institutional Repository

conference paper

© 2016 M. van der Kolk, G.J. van der Veen, J de Vreugd, Matthijs Langelaar