Numerical Simulation of Blast Effects for Group Charge in Multi-layer Medium

Basing on the research of experiments,blast effects for group charge in different multi-layer medium at different depths was numerical simulated by using LS-DYNA nonlinear finite element analytical program with ALE arithmetic.The result of the simulation was well tallied with the date of experiments.It can be a good foundation for further research of explosive effects in different thickness of concrete in the future.