有色金属材料与工程2025，Vol.46Issue(4)：82-89,8.DOI:10.13258/j.cnki.nmme.20241127001
基于激光超声的阀门焊接缺陷检测有限元仿真
Finite element simulation of valve welding defect detection dased on laser ultrasound
摘要
Abstract
In this paper,the interaction mechanism between laser ultrasonic absorption and valve welding defects is studied,and the physical process of pulsed laser-excited ultrasonic waves is numerically simulated based on COMSOL software,and the propagation characteristics and laws of laser-excited ultrasonic waves in the valve material are systematically explored.By establishing two types of valve welding models,the temperature field,stress field and pressure field excited by the laser on the valve surface were simulated,the change law of the three physical fields was studied,and the echo signals of the two models were compared and verified,and the position of the welding defect was obtained by analyzing the echo defect information through numerical simulation,the specific position of the welding defect is inversely obtained.The results show that the defect position and shape obtained by simulation are highly consistent with the preset parameters of the model.This study verifies the feasibility and accuracy of laser ultrasonic technology for valve defect detection,and confirms that the ultrasonic waves of various modes excited by laser can be used as an effective method for accurately detecting valve welding defects in industrial scenarios.关键词
激光超声/有限元分析/COMSOL软件/阀门焊接缺陷Key words
laser ultrasound/finite element analysis/COMSOL software/valve welding defects分类
信息技术与安全科学引用本文复制引用
方忠恕,邢志礼,李金勇,李强,周盛华..基于激光超声的阀门焊接缺陷检测有限元仿真[J].有色金属材料与工程,2025,46(4):82-89,8.基金项目
浙江省科学技术厅"尖兵领雁+X"研发攻关计划项目(2024C01228) （2024C01228）
