PROPAGATION OF LONGITUDINAL GUIDED WAVES IN WATER-FILLED STEEL PIPES AND ITS APPLICATIONS TO DEFECT DETECTION

摘要：

Propagation characteristics of longitudinal modes in water-filled steel pipe are studied.Longitudinal modes at 160kHz and 195kHz are excited and used to detect a artificial circumferential defect in a water-filled steel pipe.Results show the branching parts of unperturbed L(0,2) mode with low dispersion and attenuation are suitable for defect detection in water-filled pipes for its energy propagates mainly in pipe wall and the present of water dont affect it seriously.However,longitudinal modes at certain frequency ranges are unsuitable to detect defects for their energy propagates mainly in water and they disperse greatly.

关键词： longitudinal mode defect steel pipe dispersion

作者: Z.H.Liu C.F,He B.Wu

作者单位: Modem Measurement and Control Technique Laboratory,College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology,Beijing,100022,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 1373-1376

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）