摘要
本文报导了用动态光弹法记录的沿两种玻璃形成的界面上超声脉冲的传播过程。实验中所用的固-固界面是由两种玻璃组成(玻璃Ⅰ的声速较高,玻璃Ⅱ的声速较低)。实验记录了沿界面的两组波脉冲(一组传播较快,一组传播较慢)的形成及独立传播的过程。快波组包括快速层中的纵波脉冲及其产生的三种头波,慢波组包括慢速层中的纵波脉冲及其产生的二种头波。实验中出现的波组的种类和成员与已有的脉冲线源的理论解符合。
The propagation process of ultrasonic pulse along solid-solid interface is recorded by the dynamic photo-elastic method in this paper. The solid-solid interface used in the experiment is constructed by two kinds of glass (glass Ⅰ with a higher acoustic velocity, glass Ⅱ with a lower acoustic velocity). The formation and the propagation of two groups of pulse (one propagates faster, the other propagates slower) along the solid-solid interface have recorded. The fast group of pulse includes the longitudinal pulse in glass Ⅰ and three kinds of head wave. The slow group of pulse includes the longitudinal pulse in glass Ⅱ and two kinds of head wave. The kinds of the group of pulses and its components appeared in the experiments are agreement with the theoretical solution of pulsed line source.
出处
《应用声学》
CSCD
北大核心
2004年第2期7-10,共4页
Journal of Applied Acoustics
基金
国家自然科学基金资助项目(10074039)
关键词
动态光弹法
超声脉冲
固-固界面
声场
Dynamic photo-elastic method, Ultrasonic palse, Solid-solid interface
