Design and verification of a hybrid nonlinear MRE vibration absorber for controllable broadband performance

S. S. Sun, T. Yildirim, Jichu Wu, J. Yang, H. Du, S. W. Zhang, W. H. Li

研究成果: Article査読

17 被引用数 (Scopus)

抄録

In this work, a hybrid nonlinear magnetorheological elastomer (MRE) vibration absorber has been designed, theoretically investigated and experimentally verified. The proposed nonlinear MRE absorber has the dual advantages of a nonlinear force-displacement relationship and variable stiffness technology; the purpose for coupling these two technologies is to achieve a large broadband vibration absorber with controllable capability. To achieve a nonlinear stiffness in the device, two pairs of magnets move at a rotary angle against each other, and the theoretical nonlinear force-displacement relationship has been theoretically calculated. For the experimental investigation, the effects of base excitation, variable currents applied to the device (i.e. variable stiffness of the MRE) and semi-active control have been conducted to determine the enhanced broadband performance of the designed device. It was observed the device was able to change resonance frequency with the applied current; moreover, the hybrid nonlinear MRE absorber displayed a softening-type nonlinear response with clear discontinuous bifurcations observed. Furthermore, the performance of the device under a semi-active control algorithm displayed the optimal performance in attenuating the vibration from a primary system to the absorber over a large frequency bandwidth from 4 to 12 Hz. By coupling nonlinear stiffness attributes with variable stiffness MRE technology, the performance of a vibration absorber is substantially improved.

本文言語English
論文番号095039
ジャーナルSmart Materials and Structures
26
9
DOI
出版ステータスPublished - 2017 8月 14
外部発表はい

ASJC Scopus subject areas

  • 信号処理
  • 土木構造工学
  • 原子分子物理学および光学
  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 電子工学および電気工学

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