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المؤلفGhachi, Ratiba F.
المؤلفMohamed, Ahmed S.
المؤلفRenno, Jamil
المؤلفAlnahhal, Wael
تاريخ الإتاحة2022-08-25T10:20:54Z
تاريخ النشر2022
اسم المنشورJournal of vibration engineering & technologies
المعرّفhttp://dx.doi.org/10.1007/s42417-022-00614-9
الاقتباسGhachi, R.F., Mohamed, A.S., Renno, J. et al. Application of Metastructures for Targeted Low-Frequency Vibration Suppression in Plates. J. Vib. Eng. Technol. (2022). https://doi.org/10.1007/s42417-022-00614-9
الرقم المعياري الدولي للكتاب2523-3920
معرّف المصادر الموحدhttp://hdl.handle.net/10576/33436
الملخصPurpose We present an approach that combines finite element analysis and genetic algorithms to find the optimal configuration of local resonators created in the host structure to suppress their vibration in a target low-frequency range. Such local resonators are indeed metastructures that alter the wave propagation in the host structure, thereby attenuating their vibration. Methods To demonstrate the approach, we cutout zigzag resonators in a thin aluminium plate that is subjected to base-excitations. The thin plate and the zigzag cutouts are modelled using the finite element method, and the optimal location and optimal tip mass of the zigzag cutouts are obtained using genetic algorithms through iterative simulations. Two case studies are considered, and the fitness function used in the optimization problem is the plate’s root mean square of vibration in a specific low-frequency range. In the first case, the plate has two aligned zigzag cutouts. In this case, the objective is to find the optimal linear location and tip masses of the two zigzag cutouts. In the second case, the plate also has two zigzag cutouts, but their linear and transverse locations can vary along with the respective tip masses. The two optimal specimens are manufactured and tested experimentally. Results Numerical results were compared to experimental results which demonstrate that the proposed approach is reliable and can be used to tune the band gap of plates, thereby maximizing the vibration attenuation in the target frequency range. Conclusion Genetic algorithms can be used along with finite element analysis and zigzag cutouts to tune the band gap of plates subjected to base-excitations. The approach can be extended to plates/structures with other types of excitations and boundary conditions.
راعي المشروعOpen Access funding was graciously provided by the Qatar National Library.
اللغةen
الناشرSpringer
العلاقةhttp://hdl.handle.net/10576/33019
الموضوع2D metastructure
Multiobjective optimization
Genetic algorithm
Finite element simulation
Vibration attenuation
العنوانApplication of Metastructures for Targeted Low-Frequency Vibration Suppression in Plates
النوعArticle
ESSN2523-3939
dc.accessType Open Access


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