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Analysis and design of acoustic transition sections for impedance matching and mode conversion
Umeå University, Faculty of Science and Technology, Department of Computing Science. (Design Optimization)
2014 (English)In: Structural and multidisciplinary optimization (Print), ISSN 1615-147X, E-ISSN 1615-1488, Vol. 50, no 3, 395-408 p.Article in journal (Refereed) Published
Abstract [en]

This work considers the problem of designing passive transition sections to provide impedance matching and mode conversion for acoustic wave propagation. The base configuration consists of two waveguides connected by a transition section. The objective is to find a placement of material inside this section to make it function as an impedance matcher or a mode converter with minimal losses. A finite element approximation of the Helmholtz equation in a truncated domain together with Dirichlet-to-Neumann type non-reflecting boundary conditions models the wave propagation. Material distribution techniques solve the resulting topology optimization problem and the resulting interfacial devices show good transmission properties.

Place, publisher, year, edition, pages
2014. Vol. 50, no 3, 395-408 p.
Keyword [en]
design optimization, passive acoustic devices, impedance matching, power conserving scheme
National Category
Computational Mathematics
Research subject
Computing Science
URN: urn:nbn:se:umu:diva-92566DOI: 10.1007/s00158-014-1058-2ISI: 000340401600003OAI: diva2:741582
Available from: 2014-08-28 Created: 2014-08-28 Last updated: 2014-12-23Bibliographically approved

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Wadbro, Eddie
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