金属管裂纹声发射电磁激发试验研究

The Experiment Research of Electromagnetic Acoustic Emission Excitation on Metal Pipe Crack

针对电磁激发实现身管裂纹检测的问题,对电磁激发原理及实现进行深入分析,采用大容量高压电容放电方式,在金属管上实现裂纹声发射电磁激发试验。通过对有、无裂纹试件,在不同激发电压下采集信号的频域对比分析,获得了金属管裂纹的声发射激发规律,为常态下火炮身管裂纹的声发射检测提供了基础。

Aiming at electromagnetic excitation acoustic emission for barrel crack detecting, the principle and im- plementation of electromagnetic acoustic emission was analyzed in detail. The excitation experiment of acoustic emis- sion of metal pipe crack was carried on by a large-capacity and high-voltage capacitor discharge method. Acoustic e-mission signals was collected on cracks and no crack specimens under different excitation voltages ; then the signals were comparative analyzed in frequency domain. The law of electromagnetic excitation acoustic emission of metal pipe crack was obtained which provided a basis for the barrel crack detection by acoustic emission under normal.