Finite Element Simulation Analysis of Full-focus Ultrasonic Inspection of Steel Plate Weld Defects

∗Based on the principle of full-focus ultrasonic testing, with the aid of Abaqus simulation software, the Q235 steel plate with reinforcement welds is used as the test object. The phased array full-focus finite element models of crack weld defects at 30°, 45°, 60, 90° and horizontal angles are established respectively. The signal characteristics of cracked weld defects under full-focus ultrasonic testing are analyzed by obtaining stress cloud diagrams, defect echo signal diagrams, echo spectrogram diagrams, and defect echo sensitivity frequency diagrams of different defects in the simulation software. And summarized the characteristics of the crack weld defect signal provides a certain theoretical basis for the detection and identification of crack defects.