Simulation and optimization of bias magnetic field for giant magnetostrictive ultrasonic guided wave transducer

Le résumé fourni par la source

The corresponding relationship between magnetic induction intensity and GMM strain was analyzed theoretically. The finite element software COMSOL Multiphysics was used to select and compare the transducer, and the static simulation analysis of the bias magnetic field was carried out. Taking the axial magnetic induction intensity and magnetic field heterogeneity of GMM rod as optimization evaluation indexes, the optimal magnetic circuit design scheme was determined by optimizing the transducer shell material, the relative permeability of magnetic block and the structural parameters of permanent magnet. The two indexes were significantly improved, and the magnetic leakage was reduced, and clear test results were obtained.

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