Study on Disintegration without Detonation of Shelled Composition B Penetrated by Shaped Charge Jet

HU Zhongwei ^（1） ， MAO Yiming②，DING Wen②，GUO Tao②，JIANG Lin①，ZHANG Dan①， XIE Lifeng① ① School of Safety Science and Engineering，Nanjing University of Science and Technology （Jiangsu Nanjing，210094） （204号 ② College of Field Engineering，Army Engineering University of PLA （Jiangsu Nanjing， 210007）

[ABSTRACT]In order to optimize the structural parametersof conical shaped charge and explore the conditions for achieving disintegrationwithout detonation of shelled Composition B，the jetformation process wassimulatedusing AUTODYN softwarebased onorthogonal experimental method.The influences of diferent charge structural parameters such as cone angle，material，wall thickness，and charge diameter on the jet detonation capability v²d were studied. And the structural parametersfor penetrating shelled Composition Bwereoptimized.Simulationof penetrationofsteelshelled CompositionB with projectiles was conducted using theselected charge structure.The efectsof explosion height and shell thickness on the response state of explosives were investigated.The mechanism of jetpenetrationand detonationof shell chargesatdiferent explosionheightswasalsoanalyzed.Finaly，experimentalresearch wasconductedtoverifythesimulationresultsof the response stateof explosives.It was foundthat，forthe selected shellsteel shelland20mm caliber energy gathering charge，when the explosion height is less than 3.50d （shell thickness of 0.2d ）or d （shell thickness of 0.3d ）， CompositonBdetonatesunder theactionof theshock waves directly generated byjetpenetrationorthereflectedwaves obtained from shock wave contact with the back plate.When the explosion height is greater than 5.00d （shell thickness of 0.2d ）or 2，05d （shell thickness of 0.3d ），the shock wave and reflected wave generated by the residual energy of the jet could notcausethe detonationof Compositon B，and disintegrationwithoutdetonationof theammunitioncouldbeachieved.

[KEYWORDS]abandonedammunition；shaped charge；disintegration without detonation；shelled Composition B; numerical simulation；experimental verification

0 引言

废旧弹药是指因超过弹药储存期、未完全引爆、弹体受损等原因而性能下降、失去军事利用价值的弹药，或因技术及装备更新而淘汰的弹药[1]。虽然这类弹药的安定性、弹体状态发生了改变，但大多依旧具备爆炸效能[2]。出于安全性考虑，废旧弹药亟待销毁。比较传统的弹药销毁方法包括燃烧法、爆炸法、拆分法、溶解法等[34]。但这些方法大都对场地或操作条件有较高要求，并且影响范围大。因此，寻找一种有效且安全的弹药销毁方法至关重要。

聚能战斗部因能量密度高、方向性好及射流高温、高速等特点常被应用于靶板的侵彻或弹药的爆炸销毁。在射流侵彻炸药方面， Held^[5] 开展了4种不同口径的聚能装药起爆裸露炸药的试验，并与射弹撞击引爆试验结果相比较，首次从试验角度提出了Held起爆判据，即 K=v²d 。其中： v 为射流尖端速度； d 为射流尖端直径。该判据形式简单且准确性较高，因此被广泛应用于工程实践中。之后，研究人员基于Held判据，通过各种方法研究了锥角、壁厚、射流形状、靶板厚度、炸高等因素对射流形成及侵彻过程的影响[6-9]。詹发民等[10]以金属杆代替聚能装药金属射流，开展了侵彻引爆带屏蔽板炸药的仿真研究，分析了不同直径金属杆侵彻不同板厚炸药的极限速度，并与Held判据进行比较。宋乙丹等[1]通过试验对不同厚度盖板屏蔽下2种PBX炸药的射流冲击反应状态进行了探究，并得到了2种炸药的起爆临界盖板厚度。

除此之外，研究人员发现，通过控制射流侵彻引爆能力能够实现在不引爆炸药的情况下使带壳装药发生解体。……