声发射模拟信号在水介质中传播的波形特征
The Waveform Characteristic of Acoustic Emission Simulation Signals Propagation in Aqueous Medium
摘 要
采用全波形声发射仪测量了声波发生器产生的，并分别经钢板和水介质传播的声发射模拟信号，对其波形特征进行了时域分析、频谱分析和对比研究。结果表明，AE模拟信号经水介质传播后的幅度较经钢板传播后明显降低;AE模拟信号通过水介质没有明显的频散现象发生，而通过钢板传播后频散现象明显，这与钢板表面和材料内部的晶界有关。
水介质
时域分析
频谱分析
幅度
频散现象
Acoustic emission
Aqueous medium
Time domain analysis
Spectrum analysis
Amplitude
Dispersion phenomenon
Abstract
The AE simulation signals, which were produced by a sound wave generator and propagating in the steel plate and aqueous medium respectively, were detected by a full waveform acoustic emission detector, and the waveform characteristic was studied comparatively with the help of time domain analysis and frequency spectrum analysis. The results showed that the amplitudes of the AE simulation signals propagating in the aqueous medium were much more lower than those propagating in the steel plate. The dispersion phenomenon of the AE simulation signals propagating in the aqueous medium was not obvious, but was obvious when propagating in the steel plate due possibly to its surface and crystal boundary.
中图分类号 TG115.28
所属栏目 试验研究
基金项目
收稿日期 2012/8/14
修改稿日期
网络出版日期
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备注陈冲(1986-)，男，助理工程师，主要从事无损检测方面的研究。
引用该论文: CHEN Chong,LIU Xiang-Peng,LV Zhen,LIU Bing,WANG Feng,KONG Xiang-Bin,LI Mu-Sen. The Waveform Characteristic of Acoustic Emission Simulation Signals Propagation in Aqueous Medium[J]. Nondestructive Testing, 2012, 34(12): 58～60
陈冲,刘相鹏,吕震,刘兵,王风,孔祥斌,李木森. 声发射模拟信号在水介质中传播的波形特征[J]. 无损检测, 2012, 34(12): 58～60
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参考文献
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【4】Wang Hong-Liang, Ge Mao-Chen. Acoustic emission/microseismic source location analysis for a limestone mine exhibiting high horizontal stresses［J］. International Journal of Rock Mechanics & Mining Sciences,2008,45:720-728.
【5】马瑾，马文涛，马胜利，等.5°拐折构造变形物理场的试验研究与数值模拟［J］.地震地质,1995,17(4):318.
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【7】路鹏，李志雄，陶本藻，等.震级频度与古登堡-里克特关系式偏离的前兆意义［J］.地震,2006,26(4):1-7.
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【9】Lei Xing-Lin, Koji Masuda, Osamu Nishizawa, et al. Detailed analysis of acoustic emission activity during catastrophic fracture of faults in rock［J］. Journal of Structural Geology,2004,26:247-258.
【10】Alberto Carpinteri, Giuseppe Lacidogna, Simone Puzzi. From criticality to final collapse: Evolution of the “b-value” from 1.5 to 1.0，Chaos［J］. Solitons and Fractals,2009,41:843-853.
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【13】林淑真，李宗仰，陈暐家.台湾地区9.21及3.31地震的地下水位异常统计与介入分析［J］.地震地质,2003,26(4):321-327.
【14】兰双双，迟宝明.汶川地震近区深层井孔-含水层系统水位异常响应研究［J］.水文地质与工程地质,2010,37(2):1-5.
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【16】龚仁荣.结构材料中声发射传播特性的研究［D］.镇江：江苏大学,2005:12-13.
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