Piezoelectric wafer active sensor embedded ultrasonics in beams and plates
Piezoelectric wafer active sensor embedded ultrasonics in beams and plates
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DOI：
10.1007/bf02411348
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发表时间：
2003-12-01
影响因子：
2.4
通讯作者：
Zhao, W
中科院分区：
文献类型：
--
作者：
Giurgiutiu, V;Bao, J;Zhao, W
在本文中，我们提出了一个系统的理论和实验研究的基本方面，使用压电晶片有源传感器（PWAS）实现嵌入式超声波在薄规格梁和板结构的结果。这项调查开辟了路径系统应用PWAS原位健康监测。在对文献进行全面回顾之后，我们介绍了嵌入式PWAS的原理及其与宿主结构的相互作用。我们给出了一个简短的回顾兰姆波的原则，重点是理解粒子运动的波速/群速度色散。对薄壁梁和薄板试件进行了有限元建模和试验研究。轴向（S-0）和弯曲（A（0））波的传播模式进行了模拟和实验测量。验证了群速度频散曲线。使用的脉冲回波超声技术与嵌入式PWASs说明使用有限元模拟和实验。证明了使用与传感器-结构相互作用最佳调谐的高频波的重要性。最后，我们讨论了这些结果的扩展到原位结构健康监测使用嵌入式超声波。
In this paper we present the results of a systematic theoretical and experimental investigation of the fundamental aspects of using piezoelectric wafer active sensors (PWASs) to achieve embedded ultrasonics in thin-gage beam and plate structures. This investigation opens the path for systematic application of PWASs for in situ health monitoring. After a comprehensive review of the literature, we present the principles of embedded PWASs and their interaction with the host structure. We give a brief review of the Lamb wave principles with emphasis on the understanding the particle motion wave speed/group velocity dispersion. Finite element modeling and experiments on thin-gage beam and plate specimens are presented and analyzed. The axial (S-0) and flexural (A(0)) wave propagation patterns are simulated and experimentally measured. The group-velocity dispersion curves are validated. The use of the pulse-echo ultrasonic technique with embedded PWASs is illustrated using both finite element simulation and experiments. The importance of using high-frequency waves optimally tuned to the sensor-structure interaction is demonstrated. In conclusion, we discuss the extension of these results to in situ structural health monitoring using embedded ultrasonics.