Design of a real-time adaptively tuned dynamic vibration absorber with a variable stiffness property using magnetorheological elastomer
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An elastomer composite with controllable stiffness, known as a magnetorheological elastomer (MRE), is used in a dynamic vibration absorber whose natural frequency is tuned adaptively to the disturbance frequency through the application of an external magnetic field. The field-dependent property test of the fabricated MRE sample shows that the stiffness changes by more than six times compared to the baseline property value at a 40% iron powder volume concentration. The MRE is then used to fabricate a frequency-tunable dynamic absorber for mitigating transient vibrations of a one-degree-of-freedom system. Investigations show that the proposed absorber outperforms a conventional passive-type absorber throughout the tunable frequency range. © 2015 Toshihiko Komatsuzaki and Yoshio Iwata.
- Shock and Vibration
Shock and Vibration (2015), 676508, 2015-01-01
Hindawi Publishing Corporation