Abstract
A simple computational framework for analysis of acoustic-mechanical coupling is proposed. The method is based one xtended finite element models for structural vibrations and acoustic pressure fluctuations using artificial mechanical and acoustic parameters in the non-structural and non-acoustic domains, respectively. The acoustic-mechanical interaction is created using a self-coupling matrix assembled in the entire computational domain, effectively generating coupling at acoustic-mechanical interface boundaries. The simple analysis tool circumvents the need for explicit interface tracking with accuracy controlled explicitly using a contrast parameter between the physical and artificial material parameters. Furthermore, the method’s direct applicability to gradient-based topology optimization, where elements can turn from mechanical to acoustic and vice versa, is demonstrated and illustrated using a simple example.
Original language | English |
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Journal | Structural and Multidisciplinary Optimization |
Volume | 59 |
Issue number | 5 |
Pages (from-to) | 1567–1580 |
ISSN | 1615-147X |
DOIs | |
Publication status | Published - 2019 |
Keywords
- Acoustic-mechanical coupling
- Extended models
- Topology optimization