Dynamic tuning of torsional transmissibility using magnetorheological elastomer: Modelling and experimental verification
Mechanical systems with rotary machines or rotating elements experience torsional vibration, which may lead to an extreme damage and wear. Conventionally, to isolate these undesirable structural vibrations, passive elastomer or torsional dampers are used. However, these passive vibration isolat...
| Summary: | Mechanical systems with rotary machines or
rotating elements experience torsional vibration, which
may lead to an extreme damage and wear. Conventionally,
to isolate these undesirable structural vibrations, passive
elastomer or torsional dampers are used. However, these
passive vibration isolators are not adaptive to varying
oscillation frequencies in real time. Due to the need for a
real time adaptability and controllable stiffness, the
research and development of a smart material called
magnetorheological elastomer (MRE) is of interest. This
paper presents the mathematical modelling and develop-
ment of MRE with its implication in torsional vibration
control. Based on the model and through experimental
studies, the properties of the MRE such as stiffness and
transmissibility factor in regard to varying magnetic fields
are investigated. The change in magnetic field is achieved
by changing the amount of applied current. It is found out
that the stiffness of MRE increases with increasing mag-
netic field and consequently modifies system’s natural
frequency. This allows shift in the transmissibility curve to
achieve minimum transmissibility factor in the applications
involving varying frequency. |
|---|