Adaptive tuning of elasto-plastic damper

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Hysteretic dampers are frequency independent, and thereby otentially effective for several structural vibration modes, provided that the inherent amplitude dependence can be controlled. An adaptive tuning procedure is proposed, aiming at elimination of the amplitude dependence by adjusting the damper parameter(s) with respect to the magnitude of the damper motion. The procedure is demonstrated in terms of the bilinear elasto-plastic damper model, and optimality corresponds to maximum modal damping. A parametric solution for the damping ratio is obtained by a two-component system reduction technique, and maximization leads to an amplitude dependent expression for the optimal yield level. The amplitude is predicted from the most recent extremum of the damper response, and simultaneously used to adjust the yield level. Numerical examples demonstrate that the adaptive tuning procedure succeeds in controlling the amplitude dependence, resulting in equal damping for the first vibration modes.
Original languageEnglish
JournalInternational Journal of Non-Linear Mechanics
Volume42
Issue number7
Pages (from-to)928-940
ISSN0020-7462
DOIs
Publication statusPublished - 2007

Keywords

  • Optimal damping
  • Adaptive tuning
  • Elasto-plastic damper
  • Flexible structures
  • Dynamics
  • System reduction

Fingerprint Dive into the research topics of 'Adaptive tuning of elasto-plastic damper'. Together they form a unique fingerprint.

Cite this