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Optimization of Phononic Crystals for the Simultaneous Attenuation of Out-of-Plane and In-Plane Waves

[+] Author Affiliations
Osama R. Bilal, Mahmoud I. Hussein

University of Colorado at Boulder, Boulder, CO

Paper No. IMECE2011-65665, pp. 969-972; 4 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5494-5
  • Copyright © 2011 by ASME


The topological distribution of the material phases inside the unit cell composing a phononic crystal has a significant effect on its dispersion characteristics. This topology can be engineered to produce application-specific requirements. In this paper, a specialized genetic-algorithm-based topology optimization methodology for the design of two-dimensional phononic crystals is presented. Specifically the target is the opening and maximization of band gap size for (i) out-of-plane waves, (ii) in-plane waves and (iii) both out-of-plane and in-plane waves simultaneously. The methodology as well as the resulting designs are presented.

Copyright © 2011 by ASME



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