尖拱类弹丸的头形系数

定义了一个新型的用于描述一般尖拱类弹丸侵彻性能的头形系数NL，该系数是无量纲的，并且具有很强的实用性和适应性。该系数考虑了弹丸的平头效应，对截卵形弹丸和平板－尖拱弹丸等复杂头形同样适用。将该系数应用到Forrestal侵彻方程中，扩大了它的应用范围。运用修正过的Forrestal方程，计算了截卵形弹丸侵彻混凝土的最终侵深，试验结果表明头形系数NL在截卵形弹丸的侵彻问题中具有许多优越性。另外，系数NL对其它如相割尖拱和平板－尖拱等复杂头形的弹丸的适用性还有待于试验验证。

A NOSE PERFORMANCE COEFFICIENT FOR GENERAL OGIVE-NOSE PROJECTILES

A new nose performance coefficient (NPC) N L was defined for general ogive nose projectiles. It is dimensionless and has good applicability. The flat nose effect is taken into account in the coefficient. In this paper, we apply the coefficient to Forrestal's penetration equation, and extend the equations' applicated field. We apply the modified equations to penetration of concrete targets with truncated ogive nose projectiles. The test data show that the NPC N L has many advantages in penetration problem of truncated tangent ogive nose projectiles. For secant ogive nose or flat ogive nose projectiles, the conclusion still wait for the trial.