FINITE ELEMENT ANALYSIS OF MULTIPLE WAVE SCATTERING FROM DEFECTS WITHIN A CIRCULAR PIPE

机译：圆管内缺陷的多波散射的有限元分析

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As a first step to sizing the defect in pipes, FEM simulation of the circumferential wave propagation was performed on pipes with axial slot. Oblique wave was transmitted and received at angle 70 degrees to the normal on the diametrical opposite side of the slot. Received waveform by simulation is in good agreement with experiment on the arrival time and duration of main shear wave. The peak amplitude of the received shear wave drops for deeper slot, the duration of the shear wave is also dependent on the slot depth. In future, we should extract the formula for the slot size from the received waveforms. In addition, the optimum configuration of the transducer for sizing defect should be determined.

机译：作为确定管道缺陷的第一步，对具有轴向槽的管道进行了周波传播的有限元模拟。在狭缝的直径相对侧以与法线成70度的角度发射和接收倾斜波。通过仿真得到的波形与实验结果吻合良好。对于较深的缝隙，接收到的剪切波的峰值幅度下降，剪切波的持续时间也取决于缝隙深度。将来，我们应该从接收到的波形中提取时隙大小的公式。此外，应确定换能器的最佳尺寸，以确定缺陷的大小。

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来源
《Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US)》|1998年|P.79-85|共7页
会议地点 SnowbirdUT(US)
作者
Shan Lin; Toshihiro Ito; Koichiro Kawashima; Hisashi Nagamizo;
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作者单位

Department of Mechanical Engineering Nagoya Institute of Technology Nagoya, 466-8555, JAPAN;

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原文格式 PDF
正文语种 eng
中图分类无损探伤仪器;
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FINITE ELEMENT ANALYSIS OF MULTIPLE WAVE SCATTERING FROM DEFECTS WITHIN A CIRCULAR PIPE

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