结构特征参量连续变化增程弹道模型

为了分析底排-火箭复合增程弹在飞行过程中结构特征参量变化对外弹道性能的影响,在结构特征参量不变化和非连续变化的弹道计算模型基础上,根据复合增程装置的工作特点,结合底排药剂和火箭药剂的质量损耗形式,建立了结构特征参量连续变化的弹道计算模型.以某型弹为例,通过对3种弹道模型的理论计算结果对比,分析了结构特征参量变化对弹丸速度、射程以及飞行稳定性的影响.结构特征参量连续变化与不变化的弹道计算模型相比,陀螺稳定因子大8%左右,动态稳定综合因子在增程装置工作结束时刻大16.83%,结构特征参量连续变化的计算结果更加符合实际情况.

Extended-Range Ballistic Model Based on Continuous Variable Structural Characteristic Parameters

In order to investigate the influence of the variation of Structural Characteristic Parameters(SCP)on the hybrid-extended range projectile in the flight,based on the model with constant and non-continuous variable SCP,the exterior ballistic model was established with continuous variable SCP according to the operational characteristics of hybrid-extended range device.This model was combined with the mass loss of base bleed propellant grain and rocket charge.Taking certain projectile for an example,the effects of the variation of SCP on the projectile velocity,range and flight stability were analyzed by comparing theoretical calculated results of three different exterior ballistic models.Compared with the ballistic model with constant SCP,the gyroscopic stability factor of ballistic model with continuous variable SCP increases by 8%,and the maximum of dynamic comprehensive stability factor can increase by 16.83%.The calculated result of continuous variable SCP agrees well with the real conditions.