Journal article
Design and verification of a hybrid nonlinear MRE vibration absorber for controllable broadband performance
Smart materials and structures, Vol.26(9), 095039
14/08/2017
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Abstract
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.
Details
- Title
- Design and verification of a hybrid nonlinear MRE vibration absorber for controllable broadband performance
- Creators
- S S Sun - University of WollongongT Yildirim - University of WollongongJichu Wu - University of WollongongJ Yang - University of WollongongH Du - University of WollongongS W Zhang - University of Science and Technology of ChinaW H Li - University of Wollongong
- Publication Details
- Smart materials and structures, Vol.26(9), 095039
- Publisher
- IOP Publishing
- Number of pages
- 9
- Grant note
- DP150102636; LP150100040 / Australian Research Council (https://doi.org/10.13039/501100000923)
- Identifiers
- 991013160982602368
- Copyright
- © 2017 IOP Publishing Ltd.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article