基于微元法的偏心起爆战斗部破片初速计算方法  

Initial Velocity Calculation of Eccentric Initiation Warhead Fragment based on Infinitesimal Method

作　　者：刘恒言 梁争峰[1] 阮喜军 程淑杰[1] LIU Heng-yan;LIANG Zheng-feng;RUAN Xi-jun;CHENG Shu-jie(Xi′an Modern Chemistry Research Institute,Xi′an 710006,China)

机构地区：[1]西安近代化学研究所,陕西西安710006

出　　处：《含能材料》2024年第7期683-692,共10页Chinese Journal of Energetic Materials

摘　　要：破片在目标方向上的初速分布是评估定向战斗部威力的重要因素之一,为此对偏心双线起爆下战斗部定向侧全域破片的初速计算方法以及相较于中心起爆的动能增益进行了研究。基于微元思想推导了定向侧周向不同位置处破片初速的计算方法,开展了战斗部静爆试验,并将实验结果与理论计算进行对比,同时结合战斗部数值模拟结果对轴向速度修正函数进行了拟合,依据现有研究对算法普适性进行了验证。结果表明:所提出公式适用于偏心双线起爆战斗部,理论计算与试验结果间的误差不超过4.8%,计算结果符合实际情况;拟合所得修正函数可对轴向不同方位破片的飞散初速进行预估;在战斗部参数变化时算法仍具有较好的普适性,计算误差小于7.11%;与中心起爆相比,采用夹角为60°的偏心双线起爆模式可使定向侧中心-30°~30°范围内破片总动能增加34.9%。The distribution of initial fragment velocity in the aim direction is one of the important factors for evaluating the power of the directional warhead.Therefore,the calculation method of the initial fragment velocity in the whole domain on the directional side of the warhead under the eccentric double-line initiation and the kinetic energy gain compared with the central initia tion are studied.Based on the infinitesimal theory,the calculation method of the initial fragment velocity in different circumferential position on the directional side was derived,and the static explosive experiment of the warhead was carried out to compare with the theoretical result.Combined with the numerical result of the warhead,the axial velocity correction function was fitted,and the universality of the algorithm was verified according to the existing research.It is shown that the proposed formula is suitable for the warhead with eccentric double-line initiation,and the error between theoretical calculation and test results is within 4.80%,calculation result is consistent with actual situation.The fitting correction function can predict the initial velocity of the fragments in different axial direction.The algorithm still has good universality when the warhead parameters change and the calculation error is less than 7.11%.Compared with central initiation,the eccentric double-line initiation mode with an angle of 60°can increase the total kinetic energy of the fragments in the range of-30°-30°from the center of the directional side by 34.9%.

关 键 词：微元法 定向战斗部 偏心起爆 破片初速 动能增益 

分 类 号：TJ5[兵器科学与技术—军事化学与烟火技术] TJ410.1