On the wideband dynamic vibration absorber using magnetic piece-wise mechanism

Abd Razak, Nor Akhmal Ariff (2021) On the wideband dynamic vibration absorber using magnetic piece-wise mechanism. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A passive dynamic vibration absorber is a device that requires manual adjustment to adapt the natural frequency to the requirements of the structure. To modify the natural frequency, it is necessary to adjust mass and stiffness. Constant retuning is bad for structure because it is not ideal for time-varying applications. A wideband DVA was created to tackle this problem. However, wideband DVA is affected by the jump-down point based on the frequency response. Many things influence this point, one of which is damping. The contact between the stopper and the beam causes the damping element of the beam, which might limit the jump-down point's extension. Using a non-contact mechanism, the damping element should be reduced and the jump-down point should be extended. Therefore, this study aims to investigate the static and dynamic properties of the proposed mechanism by comparing with a traditional piece-wise mechanism linear stiffness study and effect of repulsive.

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