数值模拟研究屏蔽板厚度对杆式射流冲击屏蔽炸药过程的影响  

Numerical Investigation on the Initiation Mechanism of Covered Charge with Variable Thickness Shell Impacted by Rod Jet

作　　者：蒋文灿 傅丹 梁斌[1] 卢永刚[1] JIANG Wencan;FU Dan;LIANG Bin;LU Yonggang(Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang 621999,Sichuan,China;Project Management Center of PLA Rocket Force Equipment Department,Beijing 100085,China)

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621999 [2]火箭军装备部装备项目管理中心,北京100085

出　　处：《弹箭与制导学报》2023年第6期8-13,共6页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(11672278)资助。

摘　　要：为研究屏蔽板厚度变化对杆式射流冲击起爆屏蔽炸药的影响,采用任意拉格朗日-欧拉(arbitrary Lagrangian-Eulerian,ALE)流固耦合算法,对屏蔽板厚度变化时K型装药形成的聚能杆式射流(射流头部速度6556 m·s^(-1))冲击起爆屏蔽炸药过程进行了数值模拟计算研究。研究结果表明,随着屏蔽板厚度逐渐增大,屏蔽炸药的起爆方式由前驱冲击波和压缩波起爆方式转变为射流冲击起爆方式,转折点屏蔽板厚度为1.4D(D为装药口径)。当屏蔽板厚度超过3.1D时,射流已经不能使屏蔽炸药起爆。对于厚壁装药,随着屏蔽板厚度增加,射流冲击屏蔽板产生的前驱冲击波可能无法起爆屏蔽炸药,起爆方式转变为射流直接侵彻起爆屏蔽炸药,并且厚壁装药下屏蔽板的厚度将对屏蔽炸药的冲击起爆距离产生明显影响,随着屏蔽板厚度增加,冲击起爆距离明显增大。Based on the arbitrary Lagrangian-Eulerian(ALE)fluid structure coupling algorithm,the initiation mechanism of covered charge with variable thickness shell impacted by a rod jet(the head velocity of the jet is 6556 m·s^(-1))is studied.The results show that with the increasing of the thickness of the shell,the initiation mechanism of the covered charge changes from the preshock wave and compressional wave initiation mode to the jet directly impact initiation mode.The shell of the covered charge thickness is 1.4 D(D is the caliber of charge).When the thickness of the covered charge exceeds 3.1 D,the jet fails to initiate detonation of the covered charge.For thick-walled charges,as the thickness of the covered plate increases,the precursor shock wave generated by the jet impacting the covered plate may fail to initiate detonation of the shielding explosive,resulting in a change in detonation mode to direct penetration of the jet for initiating detonation.Additionally,variations in thickness of the covered plate significantly affect impact initiation distance for thick-walled charges with respect to covered charge.

关 键 词：K型装药 杆式射流 冲击起爆 屏蔽炸药 前驱波 

分 类 号：TJ410.2[兵器科学与技术—火炮、自动武器与弹药工程]