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Type: Artigo de periódico
Title: Synthesis of porous-acoustic absorbing systems by an evolutionary optimization method
Author: Silva, FI
Pavanello, R
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.
Subject: porous material
evolutionary optimization
acoustic devices
Country: Inglaterra
Editor: Taylor & Francis Ltd
Citation: Engineering Optimization. Taylor & Francis Ltd, v. 42, n. 10, n. 887, n. 905, 2010.
Rights: fechado
Identifier DOI: 10.1080/03052150903477184
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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