Analysis of a Structure with Magneto-rheological Fluid Damper

Abstract

In the last three decades or so, there has been a great deal of interest in the use of control
systems to mitigate the effects of dynamic vibrational hazards on both Mechanical and Civil Structures.
Magnetorheological (MR) Fluids are controllable fluids that respond to an applied magnetic field with a
dramatic change in rheological behaviour. An MR Fluid is a free-flowing liquid in the absence of magnetic
field, but under a strong magnetic field its viscosity can be increased by more than two orders of magnitude
in a very short time (milliseconds) and it exhibits solid-like characteristics. MR Fluid Dampers, based on
MR Fluids, have been shown to be semi-active control devices that mesh well with application demands and
constraints to offer an attractive means of controlling the intensity of vibrations in structures due to their
mechanical simplicity, high dynamic range, low power requirements, large force capacity and
robustness.The structures designed to support the high speed engines are subjected to inherent unbalance
which causes vibrational problems. The focus of this work is to study the analysis of an aluminium structure
using the Magnetorheological dampers with fluid MRF-132DGwithand without applying magnetic field.
And it is observed that the MR Fluid dampers could able to effectively reduce the mechanical vibrations of
structures.