| Maja Gębik-Wrona, MSc |
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Recent publications
| 1. | Bajkowski J.M.♦, Dyniewicz B., Gębik-Wrona M.♦, Bajkowski J.♦, Bajer C.I., Reduction of the vibration amplitudes of a harmonically excited sandwich beam with controllable core, MECHANICAL SYSTEMS AND SIGNAL PROCESSING, ISSN: 0888-3270, DOI: 10.1016/j.ymssp.2019.04.024, Vol.129, pp.54-69, 2019 Abstract: We consider a theoretical analysis and experimental test of a sandwich beam, with a core layer made of controllable material that can change its properties over time. We show that this dynamically excited beam can be sequentially controlled to obtain higher amplitude attenuation and resistance to the amplitude growth in resonant ranges than when the smart beam parameters are constant over time. Numerical simulations were performed to study the possibility of shifting beam vibration frequency towards ranges distant from resonance. An experimental study on a layered beam consisting of two steel bars with a pneumatically controlled core made of pressurized granular material was considered. A simplified control was performed to detune the beam from the resonance frequencies and reduce the vibrations by 30% in simulations and 10% in experiment. Keywords:smart material, granular structures, structural control, semi-active control, layered beam Affiliations:
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