声学与振动

Vol.7 No.2 (June 2019)

薄板声发射信号Lamb波模式的分析与验证
The Analysis and Verification of the Acoustic Emission Lamb Wave Mode in the Thin Plate

 

作者:

胥保春 , 吴京秋 , 程啟华 , 刘 欣 :南京工程学院工业中心,江苏 南京

 

关键词:

声发射Lamb波结构健康监测Acoustic Emission Lamb Wave Structural Health Monitoring

 

摘要:

文章分析了薄板不同受力方向激发的声发射波速特点,接着说明了板内Lamb波低阶模式与之对应的关系。为了验证这种关系,以铝板与环氧玻璃纤维板为实验对象,利用板面断铅与断面断铅模拟垂直与平行方向的力产生声发射,实验结果与文中理论分析相符。实验表明文中分析的Lamb波低阶模态与不同方向力激发的声发射波形之间的关系,可以用于板结构健康监测。

In this paper, the characteristics of acoustic emission wave velocity excited in different directions of force on thin plate are analyzed, and the relationship between the low-order modes of Lamb wave in plate and them is explained. In order to verify this relationship, aluminum plate and epoxy glass fiberplate are taken as experimental objects, and the vertical and parallel forces are simulated by using the lead breaking on surface and end of the plate. The acoustic emission analysis results are consistent with the theoretical analysis. The experimental results are consistent with the conclusions from the theoretical analysis in the text. The results show that the relationship between the low-order modes of Lamb wave and the acoustic emission waveforms excited by forces in different directions can be used for the structural health monitoring of plate.

文章引用:

胥保春 , 吴京秋 , 程啟华 , 刘 欣 (2019) 薄板声发射信号Lamb波模式的分析与验证。 声学与振动, 7, 59-65. doi: 10.12677/OJAV.2019.72006

 

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