2, 4-二硝基苯甲醚基熔铸含铝炸药圆筒试验及爆轰产物状态方程

To determine the parameters of equation of state (EOS) for detonation products in the shock initiation of aluminized explosives, a series of 50 mm standard cylinder tests was performed for the DNAN-based aluminized RA1 melt-cast explosive (HMX/DNAN/Al) and its corresponding explosive RF1 (HMX/DNAN/LiF) that contains the lithium fluoride (LiF). The detonation velocities of two kinds of explosives and the expanding velocities of cylinders were measured by using the electric probes and the photonic Doppler velocimetry (PDV). The EOS parameters for detonation products of RA1 and RF1 are both determined by genetic algorithm and numerical simulation. It is found that the wall velocity histories of RA1 and RF1 are almost consistent within 0-4.6 μs, but separate obviously after 4.6 μs due to the increasing reaction degree of aluminum powder. This indicates that the aluminum powder mainly reacts in the expansion process of detonation products, and hardly participates in chemical reaction during the detonation as well as the shock initiation. Therefore, in the numerical simulation of shock initiation, the detonation products of the aluminized explosives can be described by the EOS for the detonation products of their corresponding explosives that contain the lithium fluoride.