Research on Detection of Pipeline crack Defects Based on COMSOL Ultrasonic Simulation
This project is based on the finite element COMSOL numerical simulation software to establish the propagation model of L(0,2)mode ultrasonic in the pipeline and carry out the ultrasonic pipeline crack defect flaw detection simulation.By adjusting the pipeline excitation frequency,under the conditions that the pipeline geometric model,defect location and pipeline material property parameter remain unchanged,the corresponding relationship of the echo voltage amplitude of the pipeline defect crack in different propagation media,different defect orientations in the pipe is compared to realize the quantitative analysis and comparison of the pipeline crack defects and reveal the propagation characteristics of ultrasonic in the pipeline structure.The simulation results show that the optimal excitation ultrasonic frequency for the straight pipeline is 40 kHz,and the detection results of the crack reflection wave voltage amplitude of the pipeline with different propagation media,different orientations Have little influence.The L(0,2)mode ultrasonic guided wave is not sensitive to the radial defect detection and is more sensitive to the circumferential defect detection.
NETL
NSTL
万方数据
维普
