Reduction of the vibration amplitudes of a harmonically excited sandwich beam with controllable core
Jacek Mateusz Bajkowski , B. Dyniewicz , Czesław Bajer , Maja Gębik-Wrona , Jerzy Bajkowski
Abstracte consider a theoretical analysis and experimental test of a sandwich beam, with a corelayer made of controllable material that can change its properties over time. We show thatthis dynamically excited beam can be sequentially controlled to obtain higher amplitudeattenuation and resistance to the amplitude growth in resonant ranges than when thesmart beam parameters are constant over time. Numerical simulations were performedto study the possibility of shifting beam vibration frequency towards ranges distant fromresonance. An experimental study on a layered beam consisting of two steel bars with apneumatically controlled core made of pressurized granular material was considered. Asimplified control was performed to detune the beam from the resonance frequenciesand reduce the vibrations by 30% in simulations and 10% in experiment.
|Journal series||Mechanical Systems and Signal Processing, ISSN 0888-3270|
|Publication size in sheets||0.75|
|ASJC Classification||; ; ; ; ;|
|Score||= 200.0, 10-06-2020, ArticleFromJournal|
|Publication indicators||= 2; = 1; : 2017 = 2.874; : 2018 = 5.005 (2) - 2018=5.086 (5)|
|Citation count*||2 (2020-06-17)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.