摘要
探讨了DDA的动力学原理和时步积分方案,并与离散元动态松驰的显式积分格式进行了比较。在参考石根华DDA原始代码的基础上,发展了具有一定前、后处理功能的可视化计算程序,实现了爆炸载荷作用下岩石抛掷过程的计算机动态模拟。作为两个实例,对导弹侵彻爆炸成坑过程和双排孔台阶爆破的岩石运动过程进行了模拟。
In this paper,dynamics principle and time integration scheme of Discontinuous Deformation Analysis(DDA) method are discussed and compared with the explicit central difference method traditionally used in the DEM.An interactive visualization system,which consists of the pre-processor,the DDA solver and the post-processor,has been developed on the basis of the original code of Shi(Ph.D.Thesis,University of California at Berkeley,1988).The numerical simulation of movement process of rock throwing under explosion gas load has been carried out by use of the newly developed visualization system.As two practical examples,the process of pit formation from explosion of a missile penetrated into ground and the process of rock movement in bench blasting with two-row holes are simulated.
出处
《工程爆破》
2004年第3期5-8,共4页
Engineering Blasting
关键词
DDA
爆破抛掷
数值模拟
DDA
Blasting throwing
Numerical simulation
