ORIENTATION OF MAGNETIC FIELD ON THE SENSING AND ACTUATING PERFORMANCE OF AN MR-FLUID FILLED CANTILEVER BEAM

摘要

Reduction of structure vibration plays an ever more important role as structures are becoming ever more complex. The vibration of a magnetorheological fluid filled sandwich beam was investigated to examine the possibility of reducing or eliminating the vibrations by using an externally applied magnetic field. It was identified that the vibration behaviors of this sandwich beam can be changed significantly with different external magnetic fields. In addition, the effect on the damping and stiffness properties of this sandwich beam by the direction of the externally applied magnetic field was also detailed. A composite beam theory was used to optimize the effective properties of the test specimen. Experimental data obtained was found to agree well with the theoretical predictions. In addition, the potential of using the MR fluid within the cantilever beam as the sensing mechanism was also evaluated experimentally.