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ARS Home » Southeast Area » Stoneville, Mississippi » Pollinator Health in Southern Crop Ecosystems Research » Research » Publications at this Location » Publication #412726
Research Project: Ecological Assessment and Mitigation Strategies to Reduce the Risks of Bees to Stressors in Southern Crop Ecosystems

Location: Pollinator Health in Southern Crop Ecosystems Research

Title: Tuning an Acoustic Metamaterial Using Iso-geometric Analysis and Evolutionary Shape Optimization

Author
item KHAJAH, TAHSIN - University Of Texas
item Parys, Katherine

Submitted to: IEEE Transactions on Circuits and Systems 1
Publication Type: Proceedings
Publication Acceptance Date: 4/19/2024
Publication Date: 4/19/2024
Citation: Khajah, T., Parys, K.A. 2024. Tuning an Acoustic Metamaterial Using Iso-geometric Analysis and Evolutionary Shape Optimization. IEEE Transactions on Circuits and Systems 1. https://doi.org/10.1109/DCAS61159.2024.10539873.
DOI: https://doi.org/10.1109/DCAS61159.2024.10539873

Interpretive Summary: In this study we proposed a novel metamaterial to enhance the magnitude of low-frequency sound from a point source. The analyses were performed using highly accurate scattering analyses benefiting from flexibility and accuracy of IGA. The analysis domain was truncated by farfield expansion ABC which matches and exceeds the accuracy of the numerical method used. Adopting an evolutionary optimization method allowed treating the analysis platform a back box. Experimental results confirmed the functionality of the developed metamaterial at the targeted frequency. The proposed metamaterial is simple, can be tuned to estimate the direction of the sound, and provides the possibility of tuning multiple frequencies in different zones.

Technical Abstract: In this study a novel acoustic metamaterial design is proposed and optimized to enhance the sound intensity at a targeted frequency. The analyses were performed by combining Isogeometric analysis with high order farfield expansion absorbing boundary conditions. The shape optimization was performed using Differential Evolution efficiently with control point locations defined as design variables. Numerical and experimental experiments confirmed the possibility of customizing the proposed metamaterial to enhance the incoming sound at desired frequencies. As a result, the proposed metamaterial can serve as he basis of developing novel low-cost acoustic sensors. Index Terms—metamaterial, acoustic sensor, shape optimization, isogeometric analysis