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F. Gomez Silva, R. Ortigosa, J. Martinez-Frutos, "Topology Optimisation of Lattice Structures for Strain-Tunable Wave Filtering", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Sixteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 14, Paper 6.1, 2026, doi:10.4203/ccc.14.6.1

Keywords: 2D lattice structures, band gaps, BESO optimization algorithm, bi-material interpolation, topology optimization, metamaterial.

Abstract

Excessive vibrations in engineering systems can compromise performance, fatigue life and comfort, and may also lead to noise amplification, loss of precision in sensitive components, and increased maintenance requirements. These challenges motivate the development of adaptive wave-filtering materials. This work presents a topology optimization algorithm for bi-material lattice structures with a band gap at a target frequency, using a single unit cell via the Bloch-Floquet theorem. The BESO method with bi-material interpolation is employed, along with a new objective function that considers only the natural frequencies nearest the target, reducing computational cost and improving robustness as these frequencies adapt to material distribution. A novel approach is also introduced to determine the optimal material volume fraction, allowing the algorithm to autonomously maximize the band gap. The method is tested on 1D-CR and 2D-CR lattice structures, with selected results compared to existing approaches.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 14 PROCEEDINGS OF THE SIXTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: P. Iványi, J. Kruis and B.H.V. Topping Paper 6.1 Topology Optimisation of Lattice Structures for Strain-Tunable Wave Filtering F. Gomez Silva¹, R. Ortigosa² and J. Martinez-Frutos² ¹, University Carlos III of Madrid, Spain ², Technical University of Cartagena, Spain doi:10.4203/ccc.14.6.1 Full Bibliographic Reference for this paper F. Gomez Silva, R. Ortigosa, J. Martinez-Frutos, "Topology Optimisation of Lattice Structures for Strain-Tunable Wave Filtering", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Sixteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 14, Paper 6.1, 2026, doi:10.4203/ccc.14.6.1 Keywords: 2D lattice structures, band gaps, BESO optimization algorithm, bi-material interpolation, topology optimization, metamaterial. Abstract Excessive vibrations in engineering systems can compromise performance, fatigue life and comfort, and may also lead to noise amplification, loss of precision in sensitive components, and increased maintenance requirements. These challenges motivate the development of adaptive wave-filtering materials. This work presents a topology optimization algorithm for bi-material lattice structures with a band gap at a target frequency, using a single unit cell via the Bloch-Floquet theorem. The BESO method with bi-material interpolation is employed, along with a new objective function that considers only the natural frequencies nearest the target, reducing computational cost and improving robustness as these frequencies adapt to material distribution. A novel approach is also introduced to determine the optimal material volume fraction, allowing the algorithm to autonomously maximize the band gap. The method is tested on 1D-CR and 2D-CR lattice structures, with selected results compared to existing approaches. download the full-text of this paper (PDF, 19 pages, 887 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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