Effect of Terfenol-D rod structure on vibration performance of giant magnetostrictive ultrasonic transducer
Effect of Terfenol-D rod structure on vibration performance of giant magnetostrictive ultrasonic transducer
复制标题
Terfenol-D棒结构对超磁致伸缩超声换能器振动性能的影响
DOI：
10.1177/1077546320932029
复制
发表时间：
2020-05-28
影响因子：
2.8
通讯作者：
Yang, Mingshun
中科院分区：
文献类型：
--
作者：
Li, Pengyang;Liu, Qiang;Yang, Mingshun
本研究以Terfenol-D为活性材料设计了超磁致伸缩超声换能器。研究了不同Terfenol-D棒结构对超磁致伸缩换能器性能的影响。有限元分析用于分析理论超磁致伸缩换能器的动力学并验证设计。使用 ANSYS Maxwell 中的有限元分析对各种结构的 Terfenol-D 棒的涡流损耗进行了模拟。然后制作两根不同的Terfenol-D棒，沿轴向切片或沿径向切缝，然后测量由两根Terfenol-D棒组成的磁致伸缩超声换能器的阻抗和振幅。结果表明，切片Terfenol-D棒可以更有效地抑制涡流，从而获得更高的能量转换效率；因此，小型超磁致伸缩换能器的Terfenol-D棒应沿轴向切片以抑制涡流，而大型超磁致伸缩换能器的棒应采用径向切口，以保证Terfenol-D棒的完整性，避免因切割棒而对超磁致伸缩换能器的振动性能产生不利影响。
In this study, a giant magnetostrictive ultrasonic transducer was designed with Terfenol-D as the active material. The influence of different Terfenol-D rod structures on the performance of the giant magnetostrictive transducer was investigated. Finite element analysis was used to analyze the dynamics of the theoretical giant magnetostrictive transducer and to validate the design. Eddy current losses were simulated for Terfenol-D rods of various structures using finite element analysis in ANSYS Maxwell. Two different Terfenol-D rods were then fabricated with either slices along the axial direction or slit along the radial direction, then the impedance and amplitude of the magnetostrictive ultrasonic transducer composed of the two Terfenol-D rods were measured. The results suggest that sliced Terfenol-D rods can suppress eddy currents more effectively, resulting in higher energy conversion efficiency; therefore, the Terfenol-D rods of small giant magnetostrictive transducers should be sliced along the axial direction to suppress eddy currents, whereas radial slits should be adopted for the rods of large giant magnetostrictive transducers to ensure integrity of the Terfenol-D rod and avoid adverse effects on the vibration performance of the giant magnetostrictive transducer that are caused by cutting the rods.