非标准气象条件对计转数定距引信炸点精度的影响

The Influence of Non-standard Meteorology Conditions on Turn-counting Fuze Burst Accuracy

为了得到更为准确的弹丸外弹道转速衰减规律从而指导引信计转数定距设计,应用外弹道学理论和空气动力学知识,建立了非标准气象条件下弹丸质心外弹道数学模型和转速衰减规律数学模型,并应用Matlab软件针对30 mm口径旋转弹丸进行数值计算,得到了非标准气象条件下计转数装定距离不同时的弹丸炸点距离。引信定距精度随气温的增大,先升高后降低,随气压的增大而升高,随风速的增大而降低,随海拔高度的增大而降低,这些气象条件的影响随装定炸点距离的增大而降低。对30 mm口径旋转弹丸而言,当引信装定距离小于1000 m时,气温、气压、风速和海拔高度等非标准气象条件对引信定距精度影响较小。

In order to obtain the law of the attenuating rotational speed of a projectile on exterior ballistics and to guide the design of a turn-counting fixed-distance fuze,firstly,a mathematical model of the motion of the center of mass of the projectile on exterior ballistics and the law of the attenuating rotational speed was established on non-standard meteorology conditions based on the theory of exterior ballistics and aerodynamics knowledge.Then,the mathematical model was solved numerically with Matlab for a 30-caliber spinning projectile.Finally,the burst distance of the projectile on non-standard conditions was derived for different set distances.It was found that the burst accuracy of the fuze increases first and then decreased with the increase of environmental temperature,increased with the increase of the atmospheric pressure,decreased with the increase of the speed of wind,and decreased with the increase of the altitude.The influence of these meteorological conditions decreased with the increase of the set burst distance.For the 30-caliber spinning projectile,the non-standard meteorological conditions such as environmental temperature,atmospheric pressure,speed of wind and altitude had little influence on the burst accuracy of the fuze when the set burst distance was less than 1000 m.