周向超声导波在薄壁管道中的传播研究

Research on Guided Circumferential Waves in a Thin-Walled Pipe

本文研究了薄壁管道内周向导波的传播及其频散特性,并且通过对比薄壁板与薄壁管道内的导波,找出了一个比较简便研究周向导波的方法,并通过实验验证了周向导波的频散现象以及激励模态与斜探头楔型角的关系,并且认定在管道中可以激励出单一的周向导波模态.

The multimodes and dispersing characteristics of guided circumferential waves in thinwalled pipe are presented theoretically and experimentally. A simple method that can be used to research the guided circumferential waves is also given. With experiments, the phenomena of dispersion and the relationships between guided circumferential modes and probe wedge angles are verified and analyzed. Finally, excitation for single guided circumferential waves in thinwalled pipe is achieved.