Track nonlinear energy sink for rapid response reduction in building structures

Jingjing Wang, Nicholas E. Wierschem, Billie F. Spencer, Xilin Lu

Research output: Contribution to journalArticle

Abstract

A new type of nonlinear energy sink (NES), termed a track NES, is proposed in this paper. The shape of the track over which the auxiliary mass moves determines the character of the nonlinear restoring force for the NES. After deriving the equations of motion for the track NES, numerical optimization is carried out for the system implemented in a two-degree-of-freedom primary structure. The optimization results are in the track shape of a fourth-order polynomial. The performance of the track NES is compared with an equivalent tuned mass damper (TMD) and the Type I NES, which utilizes a cubic restoring force. The results of this comparison show that the attenuation observed with the track NES is competitive with the Type I NES and is more robust against changes in the underlying structure than the TMD. Moreover, the track NES is more scalable and offers greater flexibility in prescribing the associated nonlinear restoring force.

Original languageEnglish (US)
Article number04014104
JournalJournal of Engineering Mechanics
Volume141
Issue number1
DOIs
StatePublished - Jan 1 2015

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Keywords

  • Earthquakes
  • Energy dissipation
  • Impulsive loads
  • Nonlinear response
  • Nonlinear systems
  • Structural dynamics

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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