摘要
对于块体等非连续介质在外力作用下运动或破坏规律的模拟,有限元(FEM)和离散元(DEM)法有一定的局限性,而非连续变形分析方法(DDA)更适用。本研究中,利用二维DDA对有、无节理面强度两种情况下一半无限域内球形药包爆炸时爆破漏斗的形成过程进行了动态模拟,并对模拟结果进行了分析和比较。结果表明,用DDA法模拟被节理分割的岩体在爆炸载荷作用下块体的运动规律具有独特的优越性,但它还不能模拟爆炸近区的特征。
For simulation of the block movement or damage of the discontinuous media, for example blocked body, under action of outer forces, both the finite element method (FEM) and discrete element method (DEM) has a certain limitation and the discontinuous deformation analysis (DDA) is more suitable. In this study, the two-dimensional DDA is used to simulate the dynamic process of explosion funnel formulation at the time of initiating a sphere charge in a semi-infinite domain with or without the strength of joint face and the comparison between simulated results is made. The results show that the DDA has distinctive advantages for simulation of the block movement of the rock body cut by joints under action of external loads, but it is impossible to be used for simulating the movement of blocks in the zone near explosive.
出处
《工程爆破》
2004年第2期17-20,共4页
Engineering Blasting
关键词
非连续变形分析
爆破漏斗
爆炸载荷
数值模拟
Discontinuous deformation analysis
Explosion funnel
Explosive loading
Numerical simulation
