Application Study of DDA Method in Blasting Numerical Simulation
Simulation of blasting problems is one of the important applications in dynamics for the DDA method. Demolition blasting and rock blasting are two main aspects of blasting engineering and research. In this paper, the blasting demolition process of two brick walls in an anti-terrorism exercise was simulated by the DDA method firstly, and then a typical rock bench blasting was simulated with the DDA code extended by the authors especially for rock blasting simulation. The extensions of the code include: the development of plastic rock constitutive relation, the calculation of damping, the calculation of suppositional cracks, and a temporary way of boundary treatment. With these extensions, the problems of energy dissipation and stress wave reflection at finite boundaries in rock blasting simulation are solved to a certain extent, and the fragment size can be forecasted. According to the simulation results and corresponding analysis, the feasibility of simulating blasting process with DDA method was validated.
DDA method Demolition blasting Rock blasting Numerical simulation
NING YOU-JUN YANG JUN CHEN PENG-WAN
State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology, Beijing 100081, China
国际会议
北京
英文
117-122
2007-08-14（万方平台首次上网日期，不代表论文的发表时间）