文献类型：期刊文献

中文题名：充粘液管材超声导波检测模式及频厚积的选择

英文题名：Optimal Mode and Frequency-Thickness of Guided Waves Testing in Viscous Liquid-Filled Pipes

作者：项延训[1];他得安[2]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]复旦大学电子工程系,上海200433

年份：2008

卷号：30

期号：10

起止页码：707

中文期刊名：无损检测

外文期刊名：Nondestructive Testing

收录：CSTPCD;;北大核心:【北大核心2004】；

语种：中文

中文关键词：超声导波检测;充粘液管材;轴向功率流;衰减系数分布

外文关键词：Ultrasonic guided waves testing; Viscous liquid-filled pipes; Axial power flow; Attenuation coefficient distribution;

摘要：对超声纵向导波在充粘性液体管材中的轴向功率流分布进行了计算和分析,结合了系统中导波传播的衰减系数分布曲线,以此确定了用各模式检测管材的最佳频厚积范围以及其适合检测的缺陷位置。分析表明:频厚积在0.07 MHz·mm以下,用L(0,1)模式检测较为理想,检测管内壁缺陷时更为灵敏;在0.09～O.16 MHz·mm之间用L(0,2)模式检测及在0.18～0.28 MHz·mm之间用L(0,3)模式检测时较为理想。轴向功率流分布能有效地选择检测的最佳导波模式及频厚积。
The axial power flow distribution and attenuation coefficient distribution of ultrasonic longitudinal guided waves in viscous liquid-filled pipes were calculated and analyzed.The optimal location,optimal mode and its frequency-thickness products (fd) for the test pipes filled with viscous liquid were chosen according to the axial power flow distribution.The results showed that for NDT of viscous liquid-filled pipes,the optimal frequency- thickness products and testing locations of using each mode were L (0,...