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本文论述了对于给定的武器系统和给定的初速,首先是力求增大允许的极限弹芯长度,以获得最大的穿透深度。只有在穿甲弹长度已经完全充分被利用之后,增大穿甲弹的速度才是适宜的。只要能使弹芯获得足够长度,就能避免造成初速超过2000m/s,因为在增大穿孔直径,而牺牲穿孔深度情况下,初速超过这个值越多,浪费的能量也越多。长度和速度两者都增加,则会导致长径比过高。无论怎样大长径比的穿甲弹,在加速期间和自由飞行阶段可能会出现严重的完好性和稳定性问题。因此,大的弯曲挠度不仅会导致在间隔装甲中多处断裂,还会因此而导致侵彻力降低。对于这两个缺陷的补救办法是用低密度、高模量护套最大限度地加强细长弹芯。评价可能的护套材料要考虑到直径、重量、挠度和应力。根据采用碳纤维加强塑料和钢质护套两种细的缩小比例穿甲弹试验的结果,以及最初足尺寸穿甲弹射击试验结果,弹芯要用钢质护套来加强。
This paper deals with the first attempt to increase the maximum allowable ultimate core length for a given weapon system and a given muzzle velocity for maximum penetration depth. Only after the armor-piercing projectile has been fully exploited, increasing the velocity of the armor-piercing projectile is appropriate. As long as the core can get enough length, the initial velocity can be avoided to exceed 2000m / s, because in the case of increasing the diameter of the perforation and sacrificing the depth of perforation, the more the initial velocity exceeds this value, the more energy is wasted. As both length and speed increase, the aspect ratio will be too high. No matter what armor-piercing ammunition has a large aspect ratio, serious integrity and stability problems may occur during acceleration and during free-flight. As a result, large bending deflections not only cause multiple breaks in the bayonets, but also lower penetration. The remedy for both of these drawbacks is to maximize the strength of the elongated core with a low density, high modulus sheath. The possible sheath material is evaluated for diameter, weight, deflection and stress. According to the results of the two narrow scale-down armor-piercing tests using carbon fiber reinforced plastic and steel sheathing and the initial shoot-through test of full-size armor-piercing projectile, the steel core should be reinforced with steel sheathing.