华东交通大学学报2026，Vol.43Issue(4)：1-10,10.
盾构机刀盘大壁厚焊缝超声相控阵探伤仿真研究
Research on Phased Array Simulation of Weld Defects in Shield Tunneling Cutterhead
摘要
Abstract
To address the low efficiency and incomplete coverage of conventional ultrasonic testing in detecting weld quality at the fillet welds of shield machine cutterheads,a rapid imaging detection method based on ultra-sonic phased array is proposed.Numerical simulations were carried out using finite element software to design the sound beam scanning strategy for weld coverage.Simulation results indicate that when a wedge probe with a center frequency of 1 MHz and an element spacing of 0.5 mm is employed,an effective beam deflection ranging from 45°～70° can be achieved,enabling accurate detection of cracks in fillet welds.On this basis,a coherence factor(CF)weighting algorithm was applied to the traditional total focusing method(TFM)imaging to enhance pixel-level consistency,effectively suppressing artifacts and noise,and improving image contrast and edge clari-ty.The proposed method is specifically tailored for thick-walled cutterhead structures with complex fillet weld geometries.The results provide a theoretical foundation for the subsequent development of dedicated phased ar-ray probes and experimental procedures.关键词
盾构机刀盘/大壁厚/超声相控阵/角焊缝探伤/相干因子Key words
shield machine cutterhead/thick-walled weld/ultrasonic phased array/fillet weld detection/coher-ence factor分类
交通工程引用本文复制引用
李龙,李东升,杨伦磊,宋文涛,马怀祥..盾构机刀盘大壁厚焊缝超声相控阵探伤仿真研究[J].华东交通大学学报,2026,43(4):1-10,10.基金项目
河北省自然科学基金项目(E2019210309) （E2019210309）
中铁十四局集团装备有限公司科研项目(CRCC14-ZB-KYHT-2023-002) （CRCC14-ZB-KYHT-2023-002）
