Ultrasonic guided wave nondestructive testing based on magnetostrictive transducer is widely used in structural health testing due to its advantages of high efficiency,no coupling and wide application range.But the signal energy of traditional magnetostrictive transducer is weak and the detection efficiency is low.There-fore,a guided wave transducer is proposed based on PZT/Terfenol-D double-layer composite structure to im-prove energy exchange efficiency.Firstly,the resonant magnetoelectrodynamics model of the transducer is es-tablished,and the structure of the transducer is designed.Then the transducer is simulated to verify the ration-ality and feasibility of the transducer model,and its structure is optimized.Finally,a prototype was made to collect the energy of the transducer excitation signal.Compared with the traditional magnetostrictive transducer and PZT transducer,the obtained ultrasonic guided wave signals of each group were processed by filtering,and the amplitude sum of squares of the respective signals were calculated.The experiment results show that the sum of the amplitudes squared of the designed transducer is 1.49 times that of the PZT transducer,which is larger than the sum of the amplitudes squared of the traditional magnetostrictive transducer and the PZT transducer.
magnetostrictive patch transducerultrasonic guided wavegiant magnetostrictive materialmagne-toelectric composite material
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