| 应力波作用下岩石声发射实验研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 万国香 王其胜 李夕兵 |
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| 作者单位： | 1. 嘉应学院物理与光信息科技学院，广东梅州514015; 2. 嘉应学院土木工程系，广东梅州514015;3. 中南大学资源与安全工程学院，长沙410083 |
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| 基金项目： | 2009年广东高校优秀青年创新培育项目 |
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| 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。
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| 关 键 词： | 应力波 声发射 峰值能量 破碎 |
| 收稿时间： | 2009-9-9 |
| 修稿时间： | 2009-10-12 |
Acoustic emission test of a rock under action of stress wave |
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| WAN Guo-xiang,WANG Qi-sheng,LI Xi-bing.Acoustic emission test of a rock under action of stress wave[J].Journal of Vibration and Shock,2011,30(1):116-120. |
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| Authors: | WAN Guo-xiang WANG Qi-sheng LI Xi-bing |
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| Affiliation: | 1. School of Physics and Optic Information Technology, Jiaying University, Guangdong Meizhou, 514015, China;2. Department of Civil Engineering , Jiaying University, Guangdong Meizhou, 514015, China;3. School of Resources and Safety Engineering, Central South University, Changsha, 410083, China |
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| Abstract: | Experiments were made on a SHPB system and the AE law of a rock under action of stress wave was obtained.The experimental results showed that the AE signals are few before the peak of the energy occurs;and the AE energy presents two different features:(1) the energy decays rapidly after the peak of the energy occurs,however,the energy rises at the end of the loading and the inflection point appears;(2) the energy decays slowly after the peak energy occurs and the inflection point does not appear.The study r... |
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| Keywords: | stress wave acoustic emission (AE) peak energy fragmentation |
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