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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Synthesis of porous-acoustic absorbing systems by an evolutionary optimization method

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Author(s):
Silva, F. I. [1] ; Pavanello, R. [2]
Total Authors: 2
Affiliation:
[1] Fed Univ Ceara UFC, Dept Mech Engn & Mfg, Fortaleza, Ceara - Brazil
[2] State Univ Campinas Unicamp, Dept Computat Mech, Fac Mech Engn, Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ENGINEERING OPTIMIZATION; v. 42, n. 10, p. 887-905, 2010.
Web of Science Citations: 5
Abstract

Topology optimization is frequently used to design structures and acoustic systems in a large range of engineering applications. In this work, a method is proposed for maximizing the absorbing performance of acoustic panels by using a coupled finite element model and evolutionary strategies. The goal is to find the best distribution of porous material for sound absorbing panels. The absorbing performance of the porous material samples in a Kundt tube is simulated using a coupled porous-acoustic finite element model. The equivalent fluid model is used to represent the foam material. The porous material model is coupled to a wave guide using a modal superposition technique. A sensitivity number indicating the optimum locations for porous material to be removed is derived and used in a numerical hard kill scheme. The sensitivity number is used to form an evolutionary porous material optimization algorithm which is verified through examples. (AU)