文献类型：期刊文献

中文题名：超声导波目标模式的激励方法研究

英文题名：A studyon an excitation method of the target mode of ultrasonic guided waves

作者：丁涛涛[1,2,3];郭宇[1,2];项延训[3]

机构：[1]江苏徐工国重实验室科技有限公司,江苏徐州221004;[2]高端工程机械智能制造国家重点实验室,江苏徐州221004;[3]华东理工大学机械与动力工程学院,上海200237

年份：2024

卷号：43

期号：4

起止页码：20

中文期刊名：振动与冲击

外文期刊名：Journal of Vibration and Shock

收录：CSTPCD;;EI(收录号：20240915649017);Scopus;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：国家重点研发项目(2022YFF0605600);国家自然科学基金项目(12025403)。

语种：中文

中文关键词：超声导波;目标模式;梳状换能器;声场调控

外文关键词：ultrasonic guided waves;target mode;comb transducer;sound field control

摘要：超声导波检测过程中不同模态导波信号与各类损伤之间的相互作用存在差异性,直接影响了损伤检测及定位成像结果的可靠性。因此,系统研究导波目标模式的激励方法从而获得理想的导波信号,有助于实现多类型损伤的精准检出以及获得高分辨率定位成像结果。该研究基于理论分析、有限元仿真和试验测量开展了超声导波目标模式的激励方法研究。理论分析导波目标模式激励的条件,并且构建二维多物理场仿真模型进行导波目标模式激励方法的验证。试验过程中将梳状换能器与锆钛酸铅压电陶瓷(piezoelectric ceramic, PZT)进行比较分析,结果表明,梳状换能器相较于PZT压电片具有良好的模式选择能力。另外,设计制作四分之一全向和全向梳状换能器,使其进行目标模式导波信号激励的同时实现传播方向的调控。
In the process of ultrasonic guided wave detection,the interaction between different modes of guided waves and various types of damage is different,which directly affects the reliability of damage detection and localization imaging.Therefore,the excitation method of the target mode of guided waves was systematically studied to obtain the ideal guided waves,which is helpful to realize accurate detection of multi-types damage and obtain high resolution positioning imaging.In this paper,an excitation method of the target mode of guided waves was studied through the oretical analysis,finite element simulation,and experimental measurement.The excitation condition of the target mode of guided waves was analyzed theoretically,and two-dimensional multi-physical field simulation models were constructed to verify the method.The comb transducer and the piezoelectric ceramic(PZT)wafer were compared during the experiment of guided waves.The results show that the comb transducer has better mode selection ability than the PZT wafer.In addition,the quarter omnidirectional and omnidirectional comb transducers were designed to excite the target mode and control the propagation direction of guided waves.