Analysis and design of acoustic transition sections for impedance matching and mode conversion

被引:0
作者
Eddie Wadbro
机构
[1] Umeå University,Department of Computing Science
来源
Structural and Multidisciplinary Optimization | 2014年 / 50卷
关键词
Design optimization; Passive acoustic devices; Impedance matching; Power conserving scheme;
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学科分类号
摘要
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.
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页码:395 / 408
页数:13
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