A Study To Assess The Damage Of Antiaircraft Cartridge Against The Armed Helicopter

In order to research the damage of fragmentation antiaircraft cartridge against the typical armed helicopter,established a vulnerability model of the typical armed helicopter,an calculation model about the fragments field of 35 millimeters fragmentation antiaircraft cartridge and AHEAD warhead,an intersection model of the fragments and the helicopter,an calculation model about the damage of the fragments against the components of the target,an calculation model about the damage of the target caused by the damage of components.The calculation model about the fragments field and the limit piercing velocity about the fragments of the AHEAD warhead were tested through the experience.The results calculated by the calculation model about the fragments field fited the results got from the experiences,but the results calculated by the calculation model of the limit piercing velocity about the fragments were different to the results got from the experiences.The calculation model of the limit piercing velocity about the fragments was corrected by fitting.Calculated the damage of the antiaircraft cartridge against the armed helicopter,the study showed that:One antiaircraft cartridge could hardlly damage the structural component,but could damage the vital component.The frangibility of the armed helicopter showed that the fragmentations could hadlly damage the bottom of the armed helicopter,but could damage other directions at high probability(>0.7).When the burst distance was between 2.4 and 4.0 meters,it was better for 35-millimeters fragmentation antiaircraft cartridge to damage the helicopter.When the burst distance was less than 8.0 meters,it was better for the AHEAD warhead to damage the helicopter.The damage of level C about the fragmentation antiaircraft cartridge was affected more by the velocity,when the velocity was from 450 meters per second to 840 meters per second,the probability of level C was from 0.2 to 0.9,but the probability of level KK was affected less by the velocity.When the velocity was more than 700 meters per second.the damage of level C and level KK of the AHEAD warhead could both increase when the velocity increased.The damage probability of fragmentation antiaircraft cartridge changed at 'V' pattem when the encounter angle changed,and when the encounter angle was between 30?45 degree and between 135?150 degree the fragmentation antiaircraft cartridge could make a better damage.When the encounter angle was between 40?45 degree the AHEAD warhead could make a better damage.The damage probability of fragmentation antiaircraft cartridge was affected less by the miss azimuth,but affected more by the miss amount.When the miss amount was between 6.0?8.0 meters,it was better for the fragmentation antiaircraft cartridge to damage the helicopter.The damage probability of the AHEAD warhead was affected by both miss amount and miss azimuth.Increased the number of the antiaircraft cartridge could increase the damage of level C,but could hardlly increase the damage of level KK.