| 基于损伤过程的非均质岩体声发射及破坏规律数值模拟研究 |
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| 引用本文： | 李昂,朱瑞虎,葛治宏,等.基于损伤过程的非均质岩体声发射及破坏规律数值模拟研究[J].地质学刊,2019,43(4):606-611. |
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| 作者姓名： | 李昂 朱瑞虎 葛治宏 等 |
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| 作者单位： | 河海大学港口海岸与近海工程学院 |
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| 基金项目： | 国家自然科学基金青年项目 “波浪激励下高桩码头动力灾变机制与测试优化方法研究”（51709093），中央高校基本科研业务费专项（2019B40714），河海大学大学生创新创业训练项目（201910294014） |
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| 摘 要： | 声发射事件数大小及源分布特征是岩体损伤演化过程的直接表征。在前人研究的基础上，以数值模拟的方法，考虑细观非均匀特性，采用基于应变软化的弹-脆-塑性模型描述基元的损伤与破坏过程。借助FLAC3D软件中的FISH函数实现了以Weibull分布随机赋予基元材料属性及对声发射事件数的记录，从时间序列上探讨非均匀性对岩体声发射现象的影响，结果表明，均质度对于岩体的声发射规律及破坏模式影响显著。
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| 关 键 词： | 非均质岩体 损伤 声发射 破坏规律 数值模拟 FLAC3D软件 |
Numerical study of acoustic emission and failure characteristics of inhomogeneity rock mass based on damage process |
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| Li Ang,Zhu Ruihu,Ge Zhihong,et al.Numerical study of acoustic emission and failure characteristics of inhomogeneity rock mass based on damage process[J].Jiangsu Geology,2019,43(4):606-611. |
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| Authors: | Li Ang Zhu Ruihu Ge Zhihong |
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| Abstract: | The number of acoustic emission events and the characteristics of source distribution are the direct representation and reflection of rock damage evolution. Based on previous studies and considering the meso-inhomogeneity, the damage and failure process of the element were described by using the elasto-brittle-plastic model based on strain softening with the method of numerical simulation. The FISH function of the FLAC3D software was adopted to record the number of acoustic emission events and randomly assign the material attributes to the element by the Weibull distribution. Then, the influence of inhomogeneity on the acoustic emission of rock mass was discussed from the time series, which shows that the homogeneity has a significant effect on the acoustic emission law and failure mode of rock mass. |
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| Keywords: | inhomogeneous rock mass damage acoustic emission failure mode numerical simulation FLAC3D software |
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