Acoustic topology optimization of fibrous material with Delany-Bazley empirical material formulation

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

This research details a new acoustic topology optimization (ATO) framework with an empirical material formulation for fibrous material. Despite the importance of considering pressure attenuation not only by internal solid structures but also by fibrous (porous) structures in acoustic design, a systematic ATO approach with an empirical material formulation has not yet been proposed. Thus, in this paper, an empirical material formulation called the Delany-Bazley model is implemented for the development of an ATO framework for fibrous material with porosity close to 1. By means of the SIMP (solid isotropic material with penalization) interpolation functions developed for multiple structural materials, ATO processes for fibrous structures as well as internal solid structures are carried out. In addition, a heuristic filter method that allows fibrous material to emerge only at the boundaries or rims of an internal solid structure is presented. Finally, the effect of the pressure attenuation on the topological layout for fibrous materials is investigated by solving several illustrative topology optimization examples.

Original languageEnglish
Pages (from-to)1172-1187
Number of pages16
JournalJournal of Sound and Vibration
Volume332
Issue number5
DOIs
StatePublished - 2013 Mar 4

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Shape optimization
topology
Acoustics
formulations
optimization
fibers
acoustics
attenuation
rims
layouts
interpolation
porosity
filters
Interpolation
Porosity

Cite this

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abstract = "This research details a new acoustic topology optimization (ATO) framework with an empirical material formulation for fibrous material. Despite the importance of considering pressure attenuation not only by internal solid structures but also by fibrous (porous) structures in acoustic design, a systematic ATO approach with an empirical material formulation has not yet been proposed. Thus, in this paper, an empirical material formulation called the Delany-Bazley model is implemented for the development of an ATO framework for fibrous material with porosity close to 1. By means of the SIMP (solid isotropic material with penalization) interpolation functions developed for multiple structural materials, ATO processes for fibrous structures as well as internal solid structures are carried out. In addition, a heuristic filter method that allows fibrous material to emerge only at the boundaries or rims of an internal solid structure is presented. Finally, the effect of the pressure attenuation on the topological layout for fibrous materials is investigated by solving several illustrative topology optimization examples.",
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Acoustic topology optimization of fibrous material with Delany-Bazley empirical material formulation. / Yoon, Gil Ho.

In: Journal of Sound and Vibration, Vol. 332, No. 5, 04.03.2013, p. 1172-1187.

Research output: Contribution to journalArticle

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