Abstract
A new numerical magneto-dynamic model of viscoelastic-magnetorheological sandwiches is developed and validated with experimental results. The novelty of the model is that, in addition to the magnetorheological effect of the core, it also contemplates the magneto-elastic force generated in the sandwich as a result of the interaction between the magnetic vibrating sandwich and the applied magnetic field. The numerical results show the effect of magneto-elastic force on the magneto-dynamic behaviour of the sandwich in decreasing the natural frequency of the structure. Increasing the intensity of the magnetic field, the natural frequency and the vibration amplitude of the sandwich decrease in the first vibration mode, which agrees with experimental results observed in the literature. To the author’s best knowledge, this is the first time magneto-elastic force has been identified as the mechanism responsible for decreasing the natural frequencies of viscoelastic-magnetorheological sandwiches and that this magneto-dynamic behaviour has been represented.
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