Numerical simulation of damage effect of multi purpose projectiles

DOI:	10.11809/bqzbgcxb2023.05.004
Keywords:	multi purpose projectile; attacking; anti armor; reinforced concrete; shaped charge; numerical simulation; penetration
Abstract:	Multi purpose projectiles are a new type of bomb which can complete the tasks of attacking, anti armor and killing under various conditions. In order to solve the matching between the attacking of multi purpose projectiles and the function of breaking armors, this paper designs a new structure. The numerical simulation of the projectile attacking and anti armor power of the structure is carried out, and the penetration power of the projectile under different head lengths is compared when it is penetrating into various typical positions of reinforced concrete. At the same time, the effects of the wall thickness and cone angle of the liner in the projectile on the power of jet forming and the penetrated steel plate are studied. The results show that, when the projectile penetrates the reinforced concrete, the penetration depth caused by the direct impact of the projectile on the reinforcement is about 20% shallower than that of a penetration without colliding the reinforcement, and the projectile penetration trajectory will deflect when it only impacts on a single steel bar. Under the condition of the same CRH and the same velocity, the remaining head length of the projectile after penetration decreases with the decrease of the initial head length of the projectile. When the other parameters of the liner remain unchanged and the conical angle of the liner is in a range of 50 ° to 70 °, with the increase of the conical angle, the maximum velocity of the jet decreases, the jet velocity gradient decreases, and the residual velocity of the jet also decreases after it penetrates the steel plate of equal thickness. When the liner wall thickness is within 1 mm to 3 mm, the jet head velocity decreases and the velocity gradient increases with the increase of the wall thickness.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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