Topology optimization of a waveguide acoustic black hole for enhanced wave focusing
| العنوان: | Topology optimization of a waveguide acoustic black hole for enhanced wave focusing |
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| المؤلفون: | Mousavi, Abbas, Berggren, Martin, Hägg, Linus, Wadbro, Eddie, 1981 |
| المصدر: | Journal of the Acoustical Society of America. 155(1):742-756 |
| مصطلحات موضوعية: | Acoustic wave propagation, Acoustics, Black holes, Conceptual design, Focusing, Gravitation, Navier Stokes equations, Stars, Topology, Acoustic black holes, Controlling waves, Design optimization, Focusing device, Focusing effect, Hole effects, Structural-acoustics, Topology optimisation, Viscothermal loss, Wave focusing, article, black hole, controlled study, drug development, simulation, Waveguides, Matematik, Mathematics |
| الوصف: | The waveguide acoustic black hole (WAB) effect is a promising approach for controlling wave propagation in various applications, especially for attenuating sound waves. While the wave-focusing effect of structural acoustic black holes has found widespread applications, the classical ribbed design of waveguide acoustic black holes (WABs) acts more as a resonance absorber than a true wave-focusing device. In this study, we employ a computational design optimization approach to achieve a conceptual design of a WAB with enhanced wave-focusing properties. We investigate the influence of viscothermal boundary losses on the optimization process by formulating two distinct cases: one neglecting viscothermal losses and the other incorporating these losses using a recently developed material distribution topology optimization technique. We compare the performance of optimized designs in these two cases with that of the classical ribbed design. Simulations using linearized compressible Navier-Stokes equations are conducted to evaluate the wave-focusing performance of these different designs. The results reveal that considering viscothermal losses in the design optimization process leads to superior wave-focusing capabilities, highlighting the significance of incorporating these losses in the design approach. This study contributes to the advancement of WAB design and opens up new possibilities for its applications in various fields. |
| وصف الملف: | electronic |
| الوصول الحر: | https://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-98643Test https://doi.org/10.1121/10.0024470Test https://kau.diva-portal.org/smash/get/diva2:1841044/FULLTEXT01.pdfTest |
| قاعدة البيانات: | SwePub |
| تدمد: | 00014966 |
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| DOI: | 10.1121/10.0024470 |