摘要
针对小口径炮弹计转数定距原理和精度问题,应用外弹道学理论,通过空气动力学仿真结果拟合出了阻力系数与马赫之间的函数解析式,并结合弹丸质点外弹道微分方程组,采用Matlab数值仿真得到了引信计转数定距炸点斜距离和炸点时间与射角、初速和弹丸质量之间的函数关系曲线。结果表明,射角、初速和弹丸质量相对标准值分别波动6.5倍,8.3%,2.9%时,计转数定距炸点斜距离分别波动0.05%,0.90%,0.50%,炸点时间分别波动0,8%,0。其他因素不变时,计转数引信定距精度受射角和初速影响很小,只有弹丸质量略有影响。
Aiming at problems about the turns-counting ranging principle and the accuracy of the small caliber projectile,firstly,based on the theory of external ballistics and the aerodynamics knowledge,the drag coefficient was derived through the simulation,then,the function analytic formula between the drag coefficient and the velocity was fitted,finally,combining with the differential equations of the external ballistics of the projectile particle,the curves of function relation between the burst oblique distance and burst time of fuze's turns-counting ranging and the fire angle,initial velocity and projectile's mass were obtained through the numerical simulation of Matlab.The results showed that,when the relative standard of fire angle,initial velocity and projectile's mass fluctuated 6.5 times,8.3%and 2.9%respectively,the burst oblique distance of turns-counting ranging fluctuated 0.05%,0.90%,0.50%and the burst time fluctuated 0,8%and 0,respectively.Thus,the ranging accuracy of turns-counting fuze was little affected by the fire angle and initial velocity,but only slightly affected by projectile's mass when other factors were constant.
作者
刘艳欣
王雨时
闻泉
张志彪
LIU Yanxin;WANG Yushi;WEN Quan;ZHANG Zhibiao(School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)
出处
《探测与控制学报》
CSCD
北大核心
2020年第4期24-30,34,共8页
Journal of Detection & Control
关键词
旋转炮弹
外弹道学
引信原理
定距空炸
炸点距离
rotating projectile
external ballistics
fuze principle
ranging air burst
burst distance
