Semi-active phase control of tuned mass dampers for translational and torsional vibration mitigation of structures

Yong An Lai, Lap Loi Chung, Chuang Sheng Walter Yang, Lai Yun Wu

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The present study aims at demonstrating the feasibility of semi-active phase control of tuned mass dampers (TMDs) implemented in structures for simultaneous reduction in translational and torsional vibration. The semi-active phase control, which employs a semi-active friction device, applies the friction force at certain situations to adjust the TMD phase back to the 90° phase lag. Thus, the phase control tuned mass dampers (PC-TMDs) can develop the best power flow to reduce the structural vibration. In this paper, a complete phase control algorithm is proposed by considering a full range of phase differences. The proposed PC-TMDs not only improve the control performance but also prevent the TMD power from flowing back to the main structure. Furthermore, conventional suspension-type TMDs have only one tuning frequency and exhibit a potential off-tuning issue, lacking an ability to simultaneously suppress the structural translational and torsional vibration. The feasibility of application of the PC-TMDs is verified through various numerical simulations, and a practical mechanism for the PC-TMDs is introduced. The simulation results reveal the robustness of the PC-TMDs, particularly when the PC-TMDs are de-tuned to the structure. Therefore, the PC-TMDs outperform the conventional TMDs in terms of suppressing the structural responses in all the translational and torsional directions.

Original languageEnglish
Article numbere2191
JournalStructural Control and Health Monitoring
Volume25
Issue number9
DOIs
StatePublished - Sep 2018

Keywords

  • phase control
  • power flow
  • semi-active control
  • translational and torsional directions of structures
  • tuned mass damper

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