Realization of a strongly nonlinear vibration-mitigation device using elastomeric bumpers

Jie Luo, Nicholas E. Wierschem, Larry A. Fahnestock, Lawrence A. Bergman, Billie F. Spencer, Mohammad Al-Shudeifat, D. Michael McFarland, D. Dane Quinn, Alexander F. Vakakis

Research output: Contribution to journalArticle

Abstract

Recent research has shown the viability of using nonlinear energy-sink (NES) devices for vibration mitigation in mechanical and structural systems. When attached to a primary structure, these lightweight passive devices can effectively reduce the structural vibration response through their nonlinear stiffness properties. In this research, a two-degree-of-freedomNES device is designed using innovative elastomeric bumpers as the critical components providing nonlinear restoring forces. A number of elastomeric bumper configurations are evaluated experimentally, and the effect of geometric bumper parameters is investigated with a focus on their influence on the stiffness properties of the bumper. ANES device employing different bumpers is then implemented on a 6-storymodel building and tested using impulse-like basemotion. Nonlinear systemidentification of theNES device shows that nonlinear stiffness properties are achieved using the elastomeric bumpers. Shake-table testing of the building equippedwith theNES device demonstrates that the device is capable of dissipating and redistributing the induced vibration energy in a rapid, effective, and robust fashion.

Original languageEnglish (US)
Article number04014009
JournalJournal of Engineering Mechanics
Volume140
Issue number5
DOIs
StatePublished - 2014

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Keywords

  • Damping
  • Dynamic tests
  • Elastomeric bumper
  • Foam
  • Impulsive loads
  • Nonlinear energy sink
  • Nonlinear systems
  • Passive control
  • Targeted energy transfer

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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