✦ LIBER ✦

Shape and topology optimization of an acoustic horn–lens combination

✍ Scribed by Eddie Wadbro; Rajitha Udawalpola; Martin Berggren

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 418 KB
Volume: 234
Category: Article
ISSN: 0377-0427
DOI: 10.1016/j.cam.2009.08.028

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✦ Synopsis

a b s t r a c t

Using gradient-based optimization combined with numerical solutions of the Helmholtz equation, we design an acoustic device with high transmission efficiency and even directivity throughout a two-octave-wide frequency range. The device consists of a horn, whose flare is subject to boundary shape optimization, together with an area in front of the horn, where solid material arbitrarily can be distributed using topology optimization techniques, effectively creating an acoustic lens.

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