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王自平.宽频带梯形叉指式换能器优化设计及应用[J].稀有金属材料与工程(英文),2020,49(11):3790~3795.[Wang Ziping.Research on the Optimal Design and Application of Wideband TIDT Structures[J].Rare Metal Materials and Engineering,2020,49(11):3790~3795.]
Research on the Optimal Design and Application of Wideband TIDT Structures
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Received:December 15, 2019  Revised:April 18, 2020
Key words: trapezoidal interdigital transducer, structural optimization design, structure health monitoring
Foundation item:国家自然科学基金 (11872191 and 11520101001), 江苏省研究生创新基金 (KYCX19_1578)
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Wang Ziping  
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      The interdigital transducer (IDT), developed from surface acoustic wave devices, has been gradually applied to structural health monitoring systems due to its operating frequency, adjustable frequency bandwidth and low loss. Therefore, it has a wide application prospect in smart materials and structures. In this paper, the wideband trapezoidal interdigital transducer (TIDT) is studied for the shortage, narrow bandwidth, of the existing rectangular IDT. The finite element analysis method was used to optimize the TIDT structure, and the TIDT performance was tested. The preliminary application of TIDT for structural damage detection was studied through experiments. The experimental results show that TIDT improves damage recognition accuracy in practical applications and has broad application prospects.