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Numerical and experimental investigations of wave propagation in Kelvin Cell-based periodic lattice architectures
KTH, School of Engineering Sciences (SCI), Engineering Mechanics. TU Munich, Department of Civil and Environmental Engineering, Arcisstr. 21, D-80333, Munich, Germany.ORCID iD: 0000-0001-9516-7628
KTH, School of Engineering Sciences (SCI), Engineering Mechanics. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0002-6555-531X
KTH, School of Engineering Sciences (SCI), Engineering Mechanics. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0001-9980-0144
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. KTH, School of Engineering Sciences (SCI), Engineering Mechanics.ORCID iD: 0000-0003-1855-5437
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2024 (English)In: Proceedings of ISMA 2024 - International Conference on Noise and Vibration Engineering and USD 2024 - International Conference on Uncertainty in Structural Dynamics, KU Leuven, Departement Werktuigkunde , 2024, p. 2579-2593Conference paper, Published paper (Refereed)
Abstract [en]

This contribution addresses elastic waveguiding properties of 1D-periodic lattice microstructures derived from the Kelvin cell. The Kelvin cell serves as a lattice template to subsequently introduce microstructural changes by imposing twists on the cell's square faces. Such modifications break the cell mirror symmetries and offer the possibility to adjust the wave filtering characteristics based on the twist angle and choice of tesselation. Band structure analyses reveal that altering the template geometry enforces frequency gaps stemming from coupled longitudinal-torsional modes and Bragg scattering. To validate the applicability of Kelvin cell lattice structures for vibration control, finite-size samples are manufactured from SLA-printing and tested in terms of transmission spectra. The experimentally observed frequency regions of reduced transmission correspond well with the band gap layout. Simulations of finite-size samples show that visco-elastic and frequency-dependent material behavior must be accounted for to numerically predict the measured transmission characteristics.

Place, publisher, year, edition, pages
KU Leuven, Departement Werktuigkunde , 2024. p. 2579-2593
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URN: urn:nbn:se:kth:diva-358123Scopus ID: 2-s2.0-85212223256OAI: oai:DiVA.org:kth-358123DiVA, id: diva2:1924748
Conference
31st International Conference on Noise and Vibration Engineering, ISMA 2024 and 10th International Conference on Uncertainty in Structural Dynamics, USD 2024, Leuven, Belgium, September 9-11, 2024
Note

Part of ISBN 9789082893175

QC 20250116

Available from: 2025-01-07 Created: 2025-01-07 Last updated: 2025-01-16Bibliographically approved

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Kleine-Wächter, LukasRumpler, RomainMao, HuinaGöransson, Peter

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