Topology optimization of reactive acoustic mufflers using a bi-directional evolutionary optimization method

Autor(es)

Azevedo, F. M. ^[1] ; Moura, M. S. ^[2] ; Vicente, W. M. ^[3] ; Picelli, R. ^[4] ; Pavanello, R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Computat Mech, Sch Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil

^[2] Tenneco Automot, R&D Engn, Vereador Marcos Portiolli Sq 26, BR-13807900 Mogi Mirim - Brazil

^[3] Univ Estadual Campinas, Sch Agr Engn, Av Candido Rondon 501, BR-13083875 Campinas, SP - Brazil

^[4] Cardiff Univ, Cardiff Sch Engn, Queens Bldg, Cardiff CF24 3AA, S Glam - Wales

• Tipo de documento: Artigo Científico
• Fonte: STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION; v. 58, n. 5, p. 2239-2252, NOV 2018.
• Citações Web of Science: 1

Resumo

This article proposes an acoustic muffler design procedure based on finite element models and a Bi-directional Evolutionary Acoustic Topology Optimization. The main goal is to find the best configuration of barriers inside acoustic mufflers used in the automotive industry that reduces sound pressure level in the outlet of the muffler. The acoustic medium is governed by Helmholtz equation and rigid wall boundary conditions are introduced to represent acoustic barriers. The continuum problem is written in the frequency domain and it is discretized using the finite element method. The adopted objective function is Transmission Loss (TL). Increasing TL guarantees that the sound pressure level ratio between outlet and inlet of the muffler is reduced. To find the configuration of acoustic barriers that increases the Transmission Loss function of the muffler an adaptation of the Bi-directional Evolutionary Structural Optimization (BESO) method is used. Applying the proposed design procedure topologies in 2D models are reached, which raises the Transmission Loss function for one or multiple frequencies. Three examples are presented to show the efficiency of the proposed procedure. (AU)

• Processo FAPESP: 13/00085-6 - Otimização Topológica Evolucionária de Sistemas Multifísicos Poro-elasto-acústicos Acoplados
• Beneficiário: William Martins Vicente
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/18607-4 - Otimização topológica estrutural aplicada em problemas multi-físicos considerando materiais porosos
• Beneficiário: Renato Picelli Sanches
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs