基于压电晶片的超声导波激发特性试验

李鸿源; 徐鸿

基于压电晶片的超声导波激发特性试验

李鸿源,
徐鸿

华北电力大学能源动力与机械工程学院，北京102206

基金项目:

国家自然科学基金资助项目(11074073)；国家自然科学基金和神华集团有限公司联合资助项目(51134016)；中央高校基本科研业务费专项资金资助项目(10QX37)

详细信息

作者简介:
李鸿源(1985-)，男，博士研究生，主要研究方向为电站设备无损检测方向。

中图分类号: TG115.28
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出版历程
- 收稿日期: 2012-09-11
- 刊出日期: 2013-01-09

Experimental on the Excitability of Ultrasonic Guided Waves Actuated by Piezoelectric Wafer

摘要

摘要: 使用超声导波进行无损检测是实现结构健康监测的重要手段，但是其多模态特性会增加损伤信号提取难度，因此需要在激发时尽可能激励单一模态。使用粘贴于结构表面的压电晶片激发和接收超声导波，通过多种尺寸晶片在不同结构厚度下的导波试验，对导波各模态的激发特性进行了研究。结果表明附着于结构表面的压电晶片不但可激发S0模态，同时也可激发出A0模态；为了有效抑制A0模态的幅值，激发晶片的直径需要大于A0模态的波长。
- 超声导波 /
- 模态激发 /
- 压电晶片 /
- 结构健康监测
Abstract: Guided waves are used in structure health monitoring. However, the signal will be too complicated to distinguish the damage as multi-modes propagating in the wave-guide. Single mode only is therefore needed in actuating the guided waves. The surface bonded piezoelectric wafers are used as actuator and sensor in this paper. Based on the experiments, the excitabilities of different modes are studied. The results show that not only the S0 mode, but also the A0 mode will be stimulated by the surface bonded wafer. In order to inhibit the A0 mode, the diameter of the wafer should be lager than the wavelength of the mode.
- Ultrasonic guided waves /
- Mode excitability /
- Piezoelectric wafer /
- Structure health monitoring

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参考文献(20)

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基于压电晶片的超声导波激发特性试验

作者简介: 李鸿源(1985-)，男，博士研究生，主要研究方向为电站设备无损检测方向。

计量

出版历程

Experimental on the Excitability of Ultrasonic Guided Waves Actuated by Piezoelectric Wafer

计量

出版历程

目录

作者简介:
李鸿源(1985-)，男，博士研究生，主要研究方向为电站设备无损检测方向。