建筑钢结构进展2024，Vol.26Issue(5)：66-72,7.DOI:10.13969/j.cnki.cn31-1893.2024.05.008
基于超声导波的钢管杆件损伤探测模拟
Simulation of Steel Pipe Damage Detection with Ultrasonic Guided Wave
摘要
Abstract
In order to study the problem of damage defect detection of steel pipe members in grid structure,the method of applying displacement at the end of the rod was selected for finite element analysis.Considering that the ultrasonic guided wave needed to have no dispersion in a specific frequency range,the L(0,2)mode ultrasonic guided wave was selected for non-destructive testing.The frequency and signal period characteristics of guided wave signals suitable for non-destructive testing of steel pipes were analyzed.The guided wave detection of circumferential defects with different circumferential angles and axial defects with different lengths was carried out by using L(0,2)mode guided wave.The finite element analysis results show that considering the influence of multi-mode superposition and maximum reflectivity,the ultrasonic guided wave excited by Hanning sine signal with a frequency of 70 kHz and 10 cycles is suitable for the defect detection of steel pipe members.When the width and depth of the steel pipe defect are constant,the ratio of circumferential damage to the circumference is linearly proportional to the average reflectivity of the signal.关键词
超声导波/无损检测/网架结构/钢管杆件/L(0,2)模态/周向缺陷/轴向缺陷Key words
ultrasonic guided wave/non-destructive testing/grid structure/steel pipe member/L(0,2)mode/circumferential defect/axial defect分类
建筑与水利引用本文复制引用
曹栋,顾征宇,潘钻峰,王皓,杨毅超..基于超声导波的钢管杆件损伤探测模拟[J].建筑钢结构进展,2024,26(5):66-72,7.基金项目
国家自然科学基金(52078368、52038010) （52078368、52038010）
