Title :
Radiation pattern of lamb waves generated by electromagnetic acoustic transducers
Author :
Bo Liu ; Chao-ran Deng ; Chuan-liu Jiang ; Guo-fu Zhai ; Lei Kang
Author_Institution :
Sch. of Electr. Eng. & Autom., Harbin Inst. of Technol., Harbin, China
Abstract :
Radiation pattern is an important characteristic of Lamb waves when applied to nondestructive testing and evaluation. However, this character cannot be analyzed by 2-D analytical or numerical models. In this paper, a 3-D finite element (FE) model is presented and frequency domain analysis is used to study the acoustic field of Lamb waves generated by electromagnetic acoustic transducers (EMATs). Based on the FE model, the divergence angle of S0 Lamb wave is calculated to be 6.6°. Experiments are carried out to measure the in-plane displacements of Lamb waves and experiment results agree well with the simulation results.
Keywords :
acoustic transducers; finite element analysis; surface acoustic waves; ultrasonic materials testing; 3-D finite element model; Lamb waves; acoustic field; electromagnetic acoustic transducers; frequency domain analysis; in-plane displacements; radiation pattern; Acoustics; Aluminum; Coils; Eddy currents; Lorentz covariance; Magnetic fields; Vibrations; EMATs; Lamb wave; finite element model; radiation pattern;
Conference_Titel :
Nondestructive Evaluation/Testing (FENDT), 2014 IEEE Far East Forum on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-4731-7
DOI :
10.1109/FENDT.2014.6928242
