冲击载荷作用下岩体破坏规律的数值流形方法模拟研究

Simulation study on rockmass failure law with numerical manifold method under impact loading

为了更好地模拟岩体这种典型的连续与非连续介质共存的复杂结构体在冲击载荷作用下的破坏规律,在近年来新出现的数值流形方法基本理论的基础上,利用其算法程序对岩体中存在的不连续面如节理、裂隙等对岩体破裂效果的影响进行了数值模拟分析,计算结果充分显示了数值流形方法在模拟这类问题中的准确性和有效性。

Rockmass is a kind of typically complicated structure body with continuous and discontinuous media, and how to simulate the rock failure rule under impact loading is always a hotspot task in numerical simulation research. The finite element method that regards rockmass as a continuous media body, the discontinuous element method and DDA that regards rockmass as a completely discrete body do not either accurately reflects the failure characteristics. The numerical manifold method developed in recent years is a good method, which can simulate the failure behavior of the rockmass. Based on the basic theory of the numerical manifold method, the numerical simulation analysis is made to ascertain the influence of the discontinuous face such as joint, crack and so on the rock rupture effect. The calculation result shows that numerical manifold method is accurate and effective in simulating this kind of problems.