碳纤维增强复合材料层合板Lamb波衰减特性研究

唐军君,卢文秀,李 峥,褚福磊

振动与冲击 ›› 2016, Vol. 35 ›› Issue (6) : 75-79.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (6) : 75-79.
论文

碳纤维增强复合材料层合板Lamb波衰减特性研究

  • 唐军君,卢文秀,李  峥,褚福磊
作者信息 +

The research of attenuation characteristics of Lamb wave on carbon fiber reinforced composite laminated plate

  • TANG Jun-jun,LU Wen-xiu,LI Zheng,CHU Fu-lei
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文章历史 +

摘要

为提取适用于碳纤维增强复合材料层合板声发射故障诊断的模态信号,利用三维弹性理论及传递矩阵法获得Lamb波的频散曲线。以碳纤维增强复合材料层合板为研究对象搭建实验平台,改变断铅激励位置从而获得不同声发射信号。对采集的声发射信号进行小波尺度谱分析,结合频散曲线分离出不同模式的Lamb波,分别研究其不同频率的幅度及能量衰减特性。实验结果表明,较其它信号,低频率S0波幅度信号衰减速度较低,对碳纤维增强复合材料层合板的声发射故障诊断研究具有较大优势。

Abstract

In order to acquire the mode signal which is suitable for acoustic emission fault diagnosis on carbon fiber reinforced composite laminated plates, the 3D elastic theory and transfer matrix method were presented to get Lamb wave dispersion curves. An experimental platform was setup to test Lamb wave propagation property of carbon fiber reinforced composite laminated plate, and different acoustic emission signals were motivated through different pencil breakpoints. Wavelet scale spectrum and dispersion curves were used to separate different Lamb wave modes, and then the amplitude and energy attenuation characteristic were investigated respectively under different frequency. The experimental results show that, compared with other mode signals, the amplitude signal of S0 mode with low frequency has great advantage in the aspect of acoustic emission fault diagnosis on carbon fiber reinforced composite laminated plates because of its slower attenuation speed.

关键词

Lamb波 / 复合材料 / 频散曲线 / 衰减特性

Key words

Lamb wave / composite / dispersion curve / attenuation characteristics

引用本文

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唐军君,卢文秀,李 峥,褚福磊. 碳纤维增强复合材料层合板Lamb波衰减特性研究[J]. 振动与冲击, 2016, 35(6): 75-79
TANG Jun-jun,LU Wen-xiu,LI Zheng,CHU Fu-lei. The research of attenuation characteristics of Lamb wave on carbon fiber reinforced composite laminated plate[J]. Journal of Vibration and Shock, 2016, 35(6): 75-79

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