High frequency vibration performances of Terfenol-D rods with different structures

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (2) : 244-250.

LIU Qiang， HE Xiping

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Abstract

To efficiently apply Terfenol-D rods, six kinds of rods are studied in this paper. Finite element software was used to analyze and calculate the core loss of rods with different structures, and the dynamic simulation study was performed. Three types of rods were processed, and the output amplitude of the rods was tested experimentally. The results show that the core loss of untreated rod is the largest at the outer diameter surface; the core loss of slicing and slotting rods is reduced, and the core loss of slicing rods is less than that of slotting rods. The overall loss of the radial slitting rod is the largest; the overall loss of the radial cutting and bonding rod and the slicing treatment rod is less than that of the untreated rod and the radial slitting rod; the overall loss of the slicing rod at both ends is greater than that of the slicing and slotting rod and the slicing treatment rod. The untreated rod has the highest resonance frequency, the biggest mechanical quality factor, and the smallest amplitude; compared with untreated rods, the resonant frequency and mechanical quality factor of slicing rods or slitting rods are reduced, and the amplitude is increased; the resonant frequency and mechanical quality factor of the slicing treatment rod are smaller than that of the slitting treatment rod, and the amplitude is much larger than that of the slitting treatment rods.

Key words

Terfenol-D rod / core loss / output amplitude / finite element calculation

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LIU Qiang， HE Xiping. High frequency vibration performances of Terfenol-D rods with different structures[J]. Journal of Vibration and Shock, 2023, 42(2): 244-250

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