• CN:11-2187/TH
  • ISSN:0577-6686

›› 2004, Vol. 40 ›› Issue (1): 11-16.

• 论文 • 上一篇    下一篇

超声导波在管中传播的理论分析与试验研究

王秀彦;王智;焦敬品;吴斌;何存富   

  1. 北京工业大学机电学院
  • 发布日期:2004-01-15

THEORETICAL AND EXPERIMENTAL STUDIES OF ULTRASONIC GUIDED WAVES PROPAGATION IN PIPES

Wang Xiuyan;Wang Zhi;Jiao Jingpin;Wu Bin;He Cunfu   

  1. Beijing University of Technology
  • Published:2004-01-15

摘要: 采用分布式PZT传感器在管中激励和接收超声导波。根据在管状波导中传播的超声波具有频散现象及多模态特征,选择具有单一频率的特定信号激励超声波,使其频散最小;同时采用分布式传感器抑制不同模态的波型。其试验结果与理论预测相吻合。

关键词: 超声导波, 管道, 模态, 频散

Abstract: Using distributed PZT transducer, ultrasonic guided waves are generated and received in a pipe. Because multiple modes of guided wave propagation are possible in pipes and these modes are generally dispersive, the specific exciting signal of a Hanning windowed toneburst with a central frequency of 70 kHz is selected for decreasing the effect of dispersion. And guided wave are generated using 16 distributed PZT transducer in a circumferential direction for suppressing flexural modes. The experimental results are good agreement with the theoretical ones.

Key words: Pipes, Frequency disperse, Modes, Ultrasonic guided waves

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