Effect of a Magnetic Block on the Vibration Performance of the Giant Magnetostrictive Transducer

To improve the vibration performance of the giant magnetostrictive transducer, the electromechanical equivalent circuit of the transducer is derived. The finite element method is used to conduct dynamic simulation research on transducers with magnetic blocks of different sizes, and the impedance and output amplitude of the transducers are experimentally tested. The results show that the larger the diameter of the large end of the conical magnetic block, the higher the resonant frequency and output amplitude of the transducer, and the smaller the peak stress and tangential stress of the Terfenol-D rod; the peak stress of the rod is small at both ends and large in the middle, while the tangential stress is large at both ends and small in the middle. The resonant frequency, output amplitude, stress, and mechanical quality factor of the transducer with a conical magnetic block are greater than those of the transducer with a cylindrical magnetic block. The experimental test values of the resonant frequency, output amplitude, and mechanical quality factor of the two transducers are consistent with the calculation values.