Numerical simulation of flyers driven by explosion

The research on the conical flyers driven by explosion was completed for the dynamic loading of large-size concrete specimens through numerical simulation and experiment. The velocity and deformation of flyers were simulated by numerical simulation in the case of the different heights of main charges and the different sizes of flyers, and the flatness of flyer at specific location was obtained. The flatness of three sized flyers was measured based on the numerical simulation results, and the available experimental data was obtained. The results show that, when the height of main charge is 85 mm, the flatness of flyer 1 is better. When the flyer is NO.1, the flatness of flyer which correspond to the 40 mm, 50 mm and 60 mm heights of main charge is better at 80 μs. There is to be a certain distance between flyer and target so that the flyer obtains a steady velocity and the requirement of plane loading is met.