基于周向导波的厚壁管道缺陷检测及成像

基金项目:

国家质检总局科技计划资助项目(2013QK109)

详细信息

The Detection and Imaging for Thick Walled Pipes Using Circumferential Guided Wave

摘要: 针对厚壁管道,提出一种快速检测缺陷的周向导波检测法,计算了外径269 mm、壁厚32 mm的厚壁管道中周向Lamb波的频散曲线,分析了探头频率和压电晶片尺寸对检测的影响;搭建了试验平台,对缺陷进行了检测与成像.试验结果表明,周向Lamb波能对缺陷进行长距离检测,实际检测时应选择较低频率和较大尺寸的压电晶片,而且周向Lamb波在厚壁管道的传播过程中轴向声束比较集中,可通过B扫成像进行损伤评估.
- 厚壁管道 /
- 周向导波 /
- 缺陷检测 /
- 成像
Abstract: In this paper,circumferential guide wave detection method was presented,which could detect thick walled pipe defects rapidly.Dispersion curves of circumferential Lamb wave in thick walled pipe with 269mm outside diameter and 32mm wall thickness was calculated firstly.Then experimental system was built.Studies were made of the effect of frequency and size of piezoelectricity crystal on the detecting results,and imaging research on defect was carried out.The experimental results indicated that circumferential Lamb wave could detect flaws for a long distance.It is better to select low frequency and larger size of piezoelectricity crystal in practical testing.Axial acoustic beam of circumferential Lamb wave is concentrated in thick walled pipe.And it can evaluate damage through B scan imaging.
- Thick walled pipe /
- Circumferential Lamb wave /
- Defect detection /
- Imaging

[1]	周正干,冯海伟.超声导波检测技术的研究进展[J].无损检测,2006,28(2):57-63.
[2]	卢超,魏运飞,徐薇.钢轨踏面斜裂纹超声表面波B扫成像检测研究[J].仪器仪表学报,2010,31(10):2272-2278.
[3]	齐向前.导波检测技术在小径管检测中的应用[J].无损检测,2014,36(8):54-56.
[4]	靳小强,王建斌,杜云鹏.小径不锈钢管超声导波检测[J].无损检测,2013,35(4):45-47.
[5]	吴斌,颉小东,刘增华,等.厚壁管道周向导波检测技术实验研究[J].实验力学,2011,26(5):625-631.
[6]	刘增华,颉小东,吴斌,等.基于连续小波变换的厚壁管道周向导波扫描成像试验研究[J].机械工程学报,2013,49(2):14-19.