웨이브가이드 센서의 판파 전파 및 방사에 관한 연구

The new plate-type ultrasonic waveguide sensor has been developed for the versatile applications in an under-sodium viewing of a sodium-cooled fast reactor. In this study, the experimental and numerical study of the propagation and radiation beam profile of A0 leaky Lamb wave in a plate waveguide sensor has been carried out. A novel technique which is capable of steering a radiation beam of a waveguide sensor without a mechanical movement can be achieved by a frequency tuning method of the excitation pulse in the dispersive low frequency range of the A0 Lamb wave. The ANSYS-LSdyna FEM code was used in this numerical simulation for the dynamic transient analysis of the ultrasonic wave propagation.