期刊论文

中文

系统仿真学报

1004-731X

2016

28

11

2777-2783

10.16182/j.issn1004731x.joss.201611019

国家自然科学基金（51205031） 湖南省自然科学基金（2015JJ4004） 湖南省高校创新平台开放基金（14K003）

本校为第一机构

为获取管道缺陷与超声导波的作用规律,研究了导波在管道传播的频散特性,建立了含通透型缺陷的管道有限元模型,以不同尺寸的轴向缺陷和周向缺陷为对象,采用控制变量法,通过有限元仿真研究了缺陷位置、尺寸与超声导波反射系数的关系。结果表明采用L（0,2）和T（0,1）模态导波检测时,缺陷的周向大小与反射系数存在线性关系,通过缺陷回波位置和回波幅值能分别确定缺陷的轴向位置及周向大小,为管道导波检测的缺陷定量与定位提供了有益参考。

To get the relationship between the defects and ultrasonic guided wave, the dispersion characteristic of guided wave in pipe was studied. Then the finite element model of a pipe with a through-type defect was established. Taking the axial and circumferential defects with different sizes as research objects, the relationship between the defect location and defect size with the ultrasonic guided wave reflection coefficients was studied, using a control variable method, by finite element simulation. The results show that there is a linear relation...