| 超声导波在管中传播的理论分析与试验研究 |
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| 引用本文： | 王秀彦,王智,焦敬品,吴斌,何存富.超声导波在管中传播的理论分析与试验研究[J].机械工程学报,2004,40(1):11-16. |
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| 作者姓名： | 王秀彦 王智 焦敬品 吴斌 何存富 |
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| 作者单位： | 北京工业大学机电学院,北京,100022 |
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| 基金项目： | 国家自然科学基金(19972003)，北京市自然科学基金重点项目(3011001)，教育部骨干教师资助计划，北京市教委科技合同资助项目 |
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| 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。
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| 关 键 词： | 超声导波 频散 模态 管道 |
| 修稿时间： | 2002年7月10日 |
THEORETICAL AND EXPERIMENTAL STUDIES OF ULTRASONIC GUIDED WAVES PROPAGATION IN PIPES |
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| WangXiuyan WangZhi JiaoJingpin,Wu Bin He Cunfu.THEORETICAL AND EXPERIMENTAL STUDIES OF ULTRASONIC GUIDED WAVES PROPAGATION IN PIPES[J].Chinese Journal of Mechanical Engineering,2004,40(1):11-16. |
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| Authors: | WangXiuyan WangZhi JiaoJingpin Wu Bin He Cunfu |
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| Affiliation: | Beijing University of Technology |
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| 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 flex-ural modes. The experimental results are good agreement with the theoretical ones. |
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| Keywords: | Ultrasonic guided waves Frequency disperse Modes Pipes |
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