LIU Qiang1, LI Jing2, ZHANG Xiongwei2, HE Xiping1*
(1 School of Physics and Information Technology, Shaanxi Normal University,Xian 710119, Shaanxi, China;2 Shanxi Key Laboratory of Advanced Manufacturing Technology, North University of China, Taiyuan 030051, Shanxi, China)
Abstract:
To reduce the design error of giant magnetostrictive transducer at high frequency operation and suppress eddy current loss, the giant magnetostrictive transducer is designed based on the analytical method.The equivalent elastic constant of the transducer is obtained by the apparent elastic method and the resonance frequency of the transducer is calculated.The finite element software is used to calculate the equivalent elastic constant of the transducer and analyze the dynamics of the transducer. A prototype of the transducer is developed and the impedance test of the transducer is carried out. The results show that the eddy current loss on the outer diameter surface of the untreated rare earth rod is relatively large and the internal is small, and the eddy current loss of sliced rare earth rod was 67.98% lower than that of untreated rare earth rod.The resonance frequency of the transducer obtained by the apparent elasticity method is closer to the finite element calculation and experimental tests, resonance frequency of the transducer obtained based on the one-dimensional longitudinal theory is quite different from the experimental test.
KeyWords:
giant magnetostrictive material; ultrasonic transducer; finite element analysis; eddy current loss
