摘要
介绍了导波的频散特性及相关的理论成果。从导波的结构出发,分析了导波在介质中能量与位移的分布。阐述了导波检测技术领域中数值分析方法和信号处理方面的一些新技术,根据超声导波现场检测存在缺陷及不能精确定量问题,推荐使用C扫描为缺陷定量。完成检测后,对管道强度进行了分析,指出存在的主要问题,对开展超声导波检测有重要指导作用。
The frequency dispersion characteristic of guide wave and its associated theoretical results are introduced. Based on the guide wave structure, the energy and displacement distribution of the guide wave in the medium is analyzed. Some new technology concerning numerical analysis methods and signal processing are explained in the technical field of guide wave detec- tion. In view of the problem that the ultrasonic guide wave technology cannot quantify the defects, C - Scan is recommended for such quantifications. The main existing problem is pointed out, which is very important for improving ultrasonic guide wave detection.
出处
《管道技术与设备》
CAS
2009年第3期27-29,49,共4页
Pipeline Technique and Equipment
关键词
超声导波
频散特性
有限元
边界元
信号处理
C扫描
ultrasonic guide wave
frequency dispersion characteristic
finite element
boundary element
signal processing
C - Scan
