A Multi-Model Reduction Technique for Optimization of Coupled Structural-Acoustic Problems

Ester Creixell Mediante, Jakob Søndergaard Jensen, Jonas Brunskog, Martin Larsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Finite Element models of structural-acoustic coupled systems can become very large for complex structures with multiple connected parts. Optimization of the performance of the structure based on harmonic analysis of the system requires solving the coupled problem iteratively and for several frequencies, which can become highly time consuming. Several modal-based model reduction techniques for structure-acoustic interaction problems have been developed in the literature. The unsymmetric nature of the pressure-displacement formulation of the problem poses the question of how the reduction modal base should be formed, given that the modal vectors are not orthogonal due to the asymmetry of the system matrices. In this paper, a multi-model reduction (MMR) technique for structure-acoustic interaction problems is developed. In MMR, the reduction base is formed with the modal vectors of a family of models that sample the design domain of the optimization parameters. The orthogonalization of the resulting reduction base is therefore a key point in the method. The use of the different reduction approaches found in the literature for developing an efficient and robust MMR technique is investigated. Several methods are compared in terms of accuracy and size of the reduced systems for optimization of simple models.
Original languageEnglish
Title of host publicationProceedings of Inter-noise 2016
EditorsWolfgang Kropp
Number of pages12
PublisherDeutsche Gesellschaft für Akustik
Publication date2016
ISBN (Electronic) 978-3-939296-11-9
Publication statusPublished - 2016
Event45th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2016 - Hamburg, Germany
Duration: 21 Aug 201624 Aug 2016
Conference number: 45
http://www.internoise2016.org/

Conference

Conference45th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2016
Number45
Country/TerritoryGermany
CityHamburg
Period21/08/201624/08/2016
Internet address

Keywords

  • Model Reduction
  • Optimization
  • Structure-acoustic interaction

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