基于挠曲电传感阵列的悬臂梁结构损伤监测研究

doi:10.3901/JME.2025.08.009

机械工程学报 ›› 2025, Vol. 61 ›› Issue (8): 9-17.doi: 10.3901/JME.2025.08.009

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基于挠曲电传感阵列的悬臂梁结构损伤监测研究

夏锐¹, 尚红星¹, 刘姣², 宋家玮¹, 张鑫¹, 梁旭¹

1. 西安交通大学机械结构强度与振动国家重点实验室西安 710049;
2. 兰州交通大学交通运输学院兰州 730070

收稿日期:2024-04-25 修回日期:2024-10-11 出版日期:2025-04-20 发布日期:2025-05-10
作者简介:夏锐，男，1997年出生。主要研究方向为飞行器结构健康监测。E-mail：1774206591@qq.com;梁旭(通信作者)，男，1987年出生，博士，教授，博士研究生导师。主要研究方向为挠曲电理论及器件应用，力电耦合理论及应用。E-mail：xliang226@xjtu.edu.cn
基金资助:
国家自然科学基金优秀青年科学基金(12122209)和面上基金(12072251)资助项目。

Research on Damage Monitoring of Aircraft Cantilever Structure Based on Flexoelectric Sensor Array

XIA Rui¹, SHANG Hongxing¹, LIU Jiao², SONG Jiawei¹, ZHANG Xin¹, LIANG Xu¹

1. The State Key Laboratory of Mechanical Structure Strength and Vibration, Xi'an Jiaotong University, Xi'an 710049;
2. School of Transportation, Lanzhou Jiaotong University, Lanzhou 730070

Received:2024-04-25 Revised:2024-10-11 Online:2025-04-20 Published:2025-05-10

摘要/Abstract

摘要： 结构健康监测是飞行器安全运维的一个重要环节，传感器作为结构状态信息感知的最前端，对结构健康监测至关重要。针对现有压电材料在选材范围和服役温度及环境保护方面受到诸多限制，以悬臂梁结构为例，探究挠曲电传感器及其阵列在结构健康监测领域的应用。首先，基于挠曲电传感器在悬臂梁结构的传感原理，推导挠曲电传感器悬臂梁结构曲率测量的频响函数，并通过试验验证了挠曲电传感阵列用于曲率模态测量的有效性。然后采用柔性电子工艺，设计并制备一种柔性可拉伸的挠曲电传感阵列。最后，开展悬臂梁监测试验去评估传感阵列的损伤识别能力，结果表明，归一化的模态挠曲电信号差可以实现裂纹数量与位置的识别。该工作为结构健康监测提供了一种新的途径，拓展了挠曲电效应的应用范围，对挠曲电走向飞行器结构健康监测具有重要的指导意义。

关键词: 挠曲电传感器, 阵列, 曲率模态, 损伤监测, 悬臂梁结构

Abstract: Structural health monitoring is an important link in the safe operation and maintenance of aircraft, and sensors, as the forefront of structural state information sensing, are crucial for structural health monitoring. Aiming at the existing piezoelectric materials, which are subject to many limitations in terms of material selection range and service temperature as well as environmental protection, the application of flexoelectric sensors and their arrays in the field of structural health monitoring is explored by taking the cantilever beam structure as an example. Firstly, based on the sensing principle of flexoelectric sensors in cantilever beam structure, the frequency response function of flexoelectric sensors for curvature measurement in cantilever beam structure is derived, and the effectiveness of flexoelectric sensing array for curvature modal measurement is experimentally verified. Then a flexible and stretchable flexoelectric sensing array is designed and prepared by using a flexible electronic process. Finally, cantilever beam monitoring experiments were carried out to evaluate the damage identification capability of the sensing array, and the results show that the normalized modal flexoelectric signal difference can be used to identify the number and location of cracks. This work provides a new way for structural health monitoring, expands the application range of flexoelectric effect, and has important guiding significance for flexoelectric toward structural health monitoring of aircraft.

Key words: flexoelectric sensors, arrays, curvature mode, damage monitoring, cantilever structure

中图分类号:

V214

夏锐, 尚红星, 刘姣, 宋家玮, 张鑫, 梁旭. 基于挠曲电传感阵列的悬臂梁结构损伤监测研究[J]. 机械工程学报, 2025, 61(8): 9-17.

XIA Rui, SHANG Hongxing, LIU Jiao, SONG Jiawei, ZHANG Xin, LIANG Xu. Research on Damage Monitoring of Aircraft Cantilever Structure Based on Flexoelectric Sensor Array[J]. Journal of Mechanical Engineering, 2025, 61(8): 9-17.

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基于挠曲电传感阵列的悬臂梁结构损伤监测研究

Research on Damage Monitoring of Aircraft Cantilever Structure Based on Flexoelectric Sensor Array

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