应力波作用下岩石声发射实验研究

万国香;王其胜;李夕兵

振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 116-120.

PDF(3209 KB)
PDF(3209 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 116-120.
论文

应力波作用下岩石声发射实验研究

  • 万国香1;王其胜2 ;李夕兵3
作者信息 +

THE EXPERIMENTAL STUDY ON THE ACOUSTIC EMISSION (AE) OF ROCK UNDER STRESS WAVE

  • WAN Guo-xiang1;WANG Qi-sheng2; LI Xi-bing3
Author information +
文章历史 +

摘要

在霍普金森(SHPB)冲击系统上进行了应力波作用下岩石声发射实验,获得了该加载条件下岩石破裂的声发射规律。实验结果表明,应力波下,声发射峰值能量之前所出现的声发射信号相当匮乏;而且其能量规律呈现出两种明显不同的特征:I型,声发射峰值能量之后,能量迅速衰减,到了加载的末期,能量出现了一定的回升,产生了“拐点”;II型,声发射峰值能量之后,能量衰减相对I型较慢,且不出现“拐点”。研究结果表明,声发射的能量特征与岩石破碎的程度密切相关;冲击载荷作用下岩石的声发射不仅仅是裂纹信息的反映,其中也包含了对应力波信号的反映。

Abstract

The experiments were made on the SHPB system and the AE law of rock under stress wave is obtained. The experimental results show that, the AE signals are few before the peak of the energy; and the AE energy presents two different features: I mode, the energy decays rapidly after the peak of the energy, however, the energy rises at the end of the loading and the “inflection point”appears; II mode, the energy decays slowly after peak energy and the “inflection point”does not appear. The research results indicate that the AE energy features closely relate to the rock fragmentation degrees; the AE under stress wave is not only the reflection of the cracks, but of the stress wave signals.

关键词

应力波 / 声发射 / 峰值能量 / 破碎

Key words

stress wave / AE / peak energy / fragmentation

引用本文

导出引用
万国香;王其胜;李夕兵. 应力波作用下岩石声发射实验研究[J]. 振动与冲击, 2011, 30(1): 116-120
WAN Guo-xiang;WANG Qi-sheng;LI Xi-bing. THE EXPERIMENTAL STUDY ON THE ACOUSTIC EMISSION (AE) OF ROCK UNDER STRESS WAVE[J]. Journal of Vibration and Shock, 2011, 30(1): 116-120

PDF(3209 KB)

3529

Accesses

0

Citation

Detail

段落导航
相关文章

/