在模拟深井水中经波导杆传播的声发射信号特征研究

Study on the Characteristics of Acoustic Emission Signals Transmitted through Waveguide Rod in a Simulation of Deep Well Water

摘要: 本文对由断铅产生的声发射信号在模拟深井水中经圆柱形波导杆传播的波形、波谱特征进行了实验研究，并探究了声发射信号在水–声耦合系统中的衰减规律。结果表明，在模拟深井水中经波导杆传播的声发射信号比单一波导杆传播声发射信号的最大幅值、持续时间、振铃计数、能量等均相应减小，而且声发射信号发生明显的频散现象，其频率段能量主要分布在第四、五波段。

Abstract: The waveform and spectroscopy characteristics of acoustic emission signals generated by the broken lead tests through the cylindrical rod shape of waveguide in a simulation of deep well water have been studied in this article. The attenuation regulations of the acoustic emission signals in the water-acoustic coupling system have also been discussed. The results show that the maximum amplitude, duration time, ringing count and energy of the acoustic emission signals through the cylindrical rod waveguide in the simulation of deep well water were lower than that of the acoustic emission signals only through the waveguide rod. The former signals show an obvious frequency dispersion phenomenon and its frequency band energy is mainly in the fourth and fifth bands.