Comparison of transient magnetic fields for damping of magnetorheological sandwich beams

The goal of this paper is to explore the dynamics, namely, the damping, of a sandwich beam filled with magnetorheological (MR) fluid subject to different time-varying magnetic fields. The experimental portion of this research has a shaker generate vibrations in the beam before shutting off, measuring the beam’s deflection decaying. The numerical analysis is similarly conducted with an initial displacement. In either case, the decay is measured by fitting an envelope to the displacement and measuring the time it takes for the deflection to reach 5% of its initial value. These results indicate that certain transient fields have marginally less damping while also conserving electromagnet power output.