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ji yu xiao bo he kai se xiao ying de dian ci sheng fa she xin hao te xing fen xi
Author(s): 
Pages: 84-90
Year: Issue:  8
Journal: Transactions of China Electrotechnical Society

Keyword:  Electromagnetically induced acoustic emission(EMAE)metal plate crack detectioneddy current excitingsignal processing;
Abstract: 针对脉冲电磁涡流激励下,金属铝板的声发射信号具有宽频率响应以及低频干扰严重的特性,使用小波包和快速傅里叶(FFT)方法研究了不同加载条件下来自不同试件信号的高低频能量特性,揭示了不同试件的信号特征,得到了缺陷的声发射信号以及噪声的强度特性。基于声发射理论,将有限元计算的形变和声发射信号进行了归一化处理,并依据凯瑟效应,建立了有限元分析和声发射信号之间的内在联系,为理论和实验研究电磁声发射技术提供了重要的理论和实验依据。
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