Model reduction for optimization of structural-acoustic coupling problems

Ester Creixell Mediante, Jakob Søndergaard Jensen, Jonas Brunskog, M. Larsen

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

Abstract

Fully coupled structural-acoustic models of complex systems, such as those used in the hearing aid field, may have several hundreds of thousands of nodes. When there is a strong structure-acoustic interaction, performing optimization on one part requires the complete model to be taken into account, which becomes highly time consuming since many iterations may be required. The use of model reduction techniques to speed up the computations is studied in this work. The Component Mode Synthesis (CMS) method and the Multi-Model Reduction (MMR) method are adapted for problems with structure-acoustic coupling, for which two different approaches to constructing a modal reduction base are discussed. The efficiency and accuracy of the CMS and the MMR methods are strongly model-dependent; in this paper, they are compared
for two optimization problems in the hearing aid context, where the MMR technique is found to be the most efficient, speeding up the optimizations up to 6 times compared to the full model.
Original languageEnglish
Title of host publicationProceedings of ISMA 2016
Number of pages15
Publication date2016
Publication statusPublished - 2016
EventInternational Conference on Noise and Vibration Engineering 2016 - Leuven, Belgium
Duration: 19 Sep 201621 Sep 2016

Conference

ConferenceInternational Conference on Noise and Vibration Engineering 2016
CountryBelgium
CityLeuven
Period19/09/201621/09/2016

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