摘要
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 multimodes and dispersing characteristics of guided circumferential waves in thinwalled 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 thinwalled pipe is achieved.
出处
《实验力学》
CSCD
北大核心
2002年第4期419-424,共6页
Journal of Experimental Mechanics
基金
国家自然科学基金(19972003)
北京市自然科学基金重点项目(3011001)
北京市自然科学基金(3992006)
教育部骨干教师资助计划
北京市教委科技合同项目资助项目(99010303)
关键词
超声周向导波
频散
薄壁管道
无损检测
ultrasonic guided circumferential waves
frequency dispersing
thin wall pipe
NDT