| 工程爆破中径向水不耦合系数效应数值仿真 |
| |
| 引用本文： | 王志亮,李永池.工程爆破中径向水不耦合系数效应数值仿真[J].岩土力学,2005,26(12):1926-1930. |
| |
| 作者姓名： | 王志亮 李永池 |
| |
| 作者单位： | 中国科学技术大学,力学与机械工程系,合肥,230027 |
| |
| 摘 要： | 在实际工程爆破中,水不耦合炮孔是较常见的,其中水不耦合装药系数是影响爆破效果的关键因素之一。该系数取不同的值,将产生不同的应力波传播机理以及介质的损伤破坏程度。以往的研究主要集中于理论解析法和模型试验法。基于大型非线性动力分析软件LS-DYNA,采用著名的混凝土损伤Johnson-Holmquist-Concrete模型,针对无限混凝土介质水不耦合装药爆破中不同径向耦合系数Kd,展开了对比数值计算,综合分析了损伤破坏区分布和孔壁压力、加速度以及速度等与径向不耦合系数间的关系,得出的结论具有一定的参考价值。
|
| 关 键 词： | 混凝土介质 工程爆破 不耦合系数 数值分析 |
| 文章编号： | 1000-7598-（2005）12-1926-05 |
| 收稿时间： | 2004-10-08 |
| 修稿时间： | 2005-01-26 |
Numerical simulation on effects of radial water-decoupling coefficient in engineering blast |
| |
| WANG Zhi-liang,LI Yong-chi.Numerical simulation on effects of radial water-decoupling coefficient in engineering blast[J].Rock and Soil Mechanics,2005,26(12):1926-1930. |
| |
| Authors: | WANG Zhi-liang LI Yong-chi |
| |
| Institution: | Department of Modern Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230027, China |
| |
| Abstract: | In practical engineering blast,the water decoupling hole is very common.The decoupling coefficient is one of the key factors influencing explosion effects,and its different values will induce different propagation mechanisms of stress-waves and variable destructive ranges in the surrounding mediums.Previous studies mainly focus on analytical solutions and model tests.This paper uses the large-scale nonlinear dynamic analysis software,LS-DYNA,and with famous concrete damage constitutive model Johnson-Holmquist-Concrete to numerically simulate the wave-induced damage properties of concrete by adopting different radial decoupling coefficients Kd for water decoupling blast in infinite concrete medium.The relationships between the damage distribution zones around blasting hole and the pressure,acceleration,velocity of point on hole-wall with the different values of Kd are analyzed.The results obtained in this paper may be useful in engineering blast. |
| |
| Keywords: | concrete medium engineering blast decoupling coefficient numerical simulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
