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Tuesday, July 9 • 10:30 - 13:00

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The tuned vibration absorber (TVA) can significantly reduce the vibration of the primary system when it is tuned to the excitation frequency. When it is mistuned, the TVA does not work. In recent years, the adaptive tuned vibration absorbers have been studied to broaden the bandwidth of the conventional absorber. An adaptive TVA usually has a variable stiffness element. By adjusting the stiffness, the absorber natural frequency is changed too. Variable mass is also used in some TVA designs. However, we have to make the stiffness (or mass) of the absorber changes over a much wider range if we want to obtain a wider bandwidth, because the natural frequency of the absorber and the TVA stiffness (and mass) are nonlinearly related. In order to solve this problem, a hybrid vibration absorber based on variable mass and variable stiffness is studied, while its control plan is investigated in this paper. Some simulations are carried out to test the performance of the absorber and the control plan. The result shows that the new hybrid vibration absorber can markedly broaden the effective frequency bandwidth of the absorber and reduce the vibration of the primary system.

Tuesday July 9, 2019 10:30 - 13:00 EDT
St-Laurent 3, Board 09-A
  T02 Act. noise & vib. cntrl., RS03 Semi-active control