| 1. | It built ultrasonic sound beam equation based on each construction parameter of tube - tube joints . the equation can orient the defect in the welding seam of complex tube - tube joints . through computer aid calculation , the location can be confirmed rapidly 以管-管节点的各结构参数为基础,建立了超声声束方程,通过该方程可以确定复杂的管-管节点焊缝中缺陷的方位,通过计算机辅助计算,可以快速确定焊缝内部缺陷位置。 |