炮弹记转数定距影响因素分析

Analysis of Influence Factors in Flight Distance Determined by Recording Spin-number of the Projectile

为了通过记录炮弹飞行中绕纵轴的转圈数确定距离、在同一距离上形成弹幕以提高小口径炮弹的效能,分析了不同弹道参数变化对记转圈定距的影响.基于旋转稳定弹丸的6D刚体弹道方程,导出了弹丸转圈数公式,可对弹丸圈数进行准确计算.结果表明,射角变化、初速误差、发射时药温变化、弹道上横风对同样转数的飞行距离影响较小;初始扰动、弹道上气压、气温变化和纵风等对同样转数的炮弹飞行距离有较大影响,距离越远,差异越大.

To determine distance by recording spin-number of a projectile in order to improve its effect of attack is a new method. Aiming at this problem, the effect of different trajectory factors on the distance was analyzed. Based on 6D rigid body trajectory equation, the spin-number formula of the projectile was deduced, by which the spin-number can be calculated. The result shows that the effects of variation of departure angle, initial error, variation of propellant temperature and crosswind on distance were less under the conditions of equal spin-number. The effects caused by initial distrubance, atmospheric, air temperature and range wind were more. The longer the distance is, the more the effects become.