Simulation on guided waves in the pipe with defects

Abstract In this paper, the finite element numerical simulation is used. The transmission and reflection of both L (0,1) mode and F(1,1) mode of the ultrasonic guided wave were simulated. The transmission and reflection of the ultrasonic guided wave in the pipe were analyzed when the defect in different axial, circumferential, and depth. When the defect’s size changes in the axial direction and circumferential direction, the trend of the two kinds modes’ reflection coefficient is the same. In a certain size, the reflection coefficient of F(1,1) is higher than the L(0,1). When the depth of the effect change, the trend of the two modes’ reflection coefficient is different.