激光技术, 2014, 38 (2): 260, 网络出版: 2014-06-30   

铝材管道管壁厚度对激光超声信号影响的探究

Effect of wall thickness of aluminum pipes on laser-induced ultrasonic waves
作者单位
南京邮电大学 光电工程学院, 南京 210023
摘要
为了探究管壁厚度对超声信号的产生与探测的影响, 采用有限元法建立了理想化的管道模型, 分别探究均匀管壁厚度变化和激发源处、接收端处及传播路径上等畸变管壁厚度的变化对超声信号产生的影响。结果表明, 当接收端处管壁厚度较薄时, 无法探测到可分辨的瑞利波信号; 传播路径上管壁厚度变小到一定程度后, 高频成分会出现明显的衰减, 但随着厚度的增大又会在一定程度内恢复。这一结果对激光超声在柱状、管状材料的无损检测中的进一步应用提供了有益的补充。
Abstract
In order to explore effect of wall thickness on the generation and detection of ultrasound signal, several idealized eccentric pipe models were established based on the finite element method. Effect of different uniform wall-thickness and thickness change at the excitation source, detection point and the propagation path on ultrasonic signal was analyzed. The simulation results show that: when the wall is thinner, the Rayleigh waves cannot be detected; the wall thickness on the propagation path becomes small to some extent, the filtering effect will be so obvious that the high-frequency component is filtered out, but will resume within a certain extent in the pipes with thicker wall. This work will provide a useful guidance for the further application of laser ultrasonic in cylinder nondestructive testing field.

王贵鑫, 严刚, 关建飞. 铝材管道管壁厚度对激光超声信号影响的探究[J]. 激光技术, 2014, 38(2): 260. WANG Guixin, YAN Gang, GUAN Jianfei. Effect of wall thickness of aluminum pipes on laser-induced ultrasonic waves[J]. Laser Technology, 2014, 38(2): 260.

本文已被 2 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!