摘要
导波技术在管道损伤检测领域具有良好的应用前景,国内外许多学者对其进行了大量的研究。介绍了导波传播特性、导波模式及检测管道损伤的原理、频率的选择、试验方法、信号处理与特征提取方法及有限元数值模拟方法等。导波检测技术虽然在管道损伤检测领域有其显著的优势,但存在导波对金属周向缺损面积小的缺陷及轴向裂纹不敏感,在管道中的吸收衰减、频散衰减、剪切衰减现象制约着在长距离管道检测中的应用等问题。在总结分析前人研究工作的基础上,认为利用10~20 kHz的低频导波对管道损伤进行检测,并应用ANSYS有限元分析软件,通过对接收信号的分析便可准确定位缺陷。
Guided wave technology has a good prospect in the field of pipeline damage detection. Many scholars at home and abroad have conducted a lot of researches. This paper introduced guided wave propagation characteristics, waveguide mode, the principle of the detection pipeline dam-age, frequency selection, experimental methods, signal processing and feature extraction method and finite element numerical simulation methods and so on. Guided wave detection technology has a significant advantage in the field of pipeline damage detection, but there were also some prob- lems such as guided wave had a defect that it had small detection area of the circumferential defects of metal, it was insensitive to axial cracks, and the absorption attenuation, dispersion attenuation and shear attenuation phenomenons in the pipeline restricted the application of guided wave in long-distance pipeline inspection. On the basis of summary analysis of previous studies, this paper considered that the use of 10 -20 kHz low-fre-quency guided wave to detect the pipeline damage with the ANSYS finite element analysis software, through the analysis of the received signal could accurately position defects.
出处
《人民黄河》
CAS
北大核心
2013年第3期124-126,130,共4页
Yellow River
基金
科技部中美合作重大项目(2006DFB71680)
关键词
导波技术
管道损伤检测
有限元数值模拟
guided wave technology
pipeline damage detection
finite element simulation