贮存老化对某弹药射程的影响研究

目的 研究长期贮存老化对某弹药射程的影响，确定其有效增程射角范围。方法 对130 mm某弹药在不同贮存老化时间下的射程进行数值仿真分析，揭示其射程和有效增程射角范围随贮存时间的变化规律。结合射程与贮存老化时间和射角之间的函数关系，提出以剩余推力比为表征参数的射程变化模型。结果 在相同贮存老化时间下，随着射角的增大，该弹药的射程呈现出先增大、后减小的趋势。相同射角下，射程随贮存老化时间呈线性下降趋势，有效增程射角范围逐渐减小。使用三次多项式拟合有效增程比与射角之间的函数关系，拟合方程的相关系数超过了0.997 0。该弹药射程变化模型的拟合结果与仿真计算结果的相关系数大于0.998 5，表明其可以准确描述该弹药的射程变化规律。结论 贮存老化会显著影响某弹药的射程和有效增程射角范围，在实际贮存和使用过程中，不能忽略其贮存老化因素。

Effect of Storage Aging on the Range of Certain Projectile

The work aims to study the effect of long-term storage aging on the range of certain projectile and determine the range of effective extended range firing angle. The range of a certain projectile used in 130 mm naval gun under different storage aging time was analyzed by numerical simulation and the variation law of range and the range of effective extended range firing angle with storage time were revealed. Combined with the functional relationship between range and storage aging time and firing angle of the projectile, a range variation model characterized by residual thrust ratio was proposed. The range of the projectile firstly increased and then decreased with the increase of the firing angle under the same storage aging time. At the same firing angle, the range decreased linearly with the storage aging time, and the range of the effective extended range firing angle decreased gradually. The cubic polynomial was used to fit the functional relationship between the effective extended range ratio and the firing angle, of which the correlation coefficient exceeded 0.997 0. The correlation coefficient between the fitting result of the range variation model and the range simulation calculation result of the projectile was greater than 0.998 5, which indicated that the range variation law could be accurately described by the proposed range aging model. Storage aging will significantly affect the range and the range of effective extended range firing angle of the projectile, which can not be ignored in the actual storage and use process.