聚能射流作用下带壳PBX装药响应特性实验与仿真模拟  

Experimental and Numerical Study on the Response Characteristics of Shell PBX Charges under Jetting Action

作　　者：邢旭阳 肖有才 余万千 屈可朋[3] 蒋海燕[3] 王志军[1] XING Xu-yang;XIAO You-cai;YU Wan-qian;QU Ke-peng;JIANG Hai-yan;WANG Zhi-jun(College of Mechatronic Engineering,North University of China,Taiyuan 030051,China;Xi′an Mordern Control Technology Research Institute,Xi′an 710065,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]西安现代控制技术研究所,陕西西安710065 [3]西安近代化学研究所,陕西西安710065

出　　处：《火炸药学报》2025年第2期177-185,I0007,共10页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.12372368);山西省自然科学面上基金(No.202303021211142)。

摘　　要：为了研究聚能射流作用下带壳PBX装药的响应特性及撞击安全性,开展了50 mm和81 mm两种射流源在不同炸高下的射流冲击实验;设计了一套射流作用下可接触式测量带壳PBX装药反应形成冲击波的实验装置,获取了实验中弹体底部的冲击波压力、弹体底部钢柱中的应力波;提出了一种射流冲击实验中带壳装药反应形成冲击波的测试方法;利用LS-DYNA对实验过程进行了数值模拟,并且分析了射流口径与炸高对带壳装药冲击起爆的影响,给出了不同口径射流作用下带壳PBX装药临界起爆条件。结果表明,50 mm的射流源在自身直径分别为2倍、4倍和6倍炸高时均能引爆带壳PBX装药,使其发生爆轰反应;81 mm的射流源在3倍和5倍炸高时可以引爆带壳PBX装药,当炸高增加至8倍时,带壳PBX装药则没有发生爆轰反应;在PBX装药发生完全爆轰反应时,弹体底部的冲击波压力达到23 GPa,弹体底部钢柱距顶端100 mm处应力波强度约600 MPa。模拟结果和实验结果吻合较好。同时,50 mm和81 mm两种药型罩射流冲击带壳装药临界起爆炸高分别为其口径的9倍和7倍,说明射流口径对其本身毁伤性能的影响大于炸高,当射流穿过壳体后剩余能量大于38.4 mm 3/μs^(2)即会引发爆轰反应。In order to investigate the response characteristics of PBX charge with shell and their impact safety under concentrated jet impacts,detonation experiments were conducted by using two types of jet sources:50 mm and 81 mm at different blast heights.A dedicated experimental setup was designed to measure the force field during bombardment,as well as the pressure at the bottom of the projectile and within the projectile itself during the attenuation process of pressure and stress in impact detonations.Numerical simulations of the experimental process were carried out by using LS-DYNA.The effect of jet diameter and burst height on the impact initiation of cased explosives were analyzed.The critical detonation conditions of PBX charge with shell under different caliber jets are provided.The results indicate that when PBX charge with shell at 2,4,or 6 times its own diameter explosion height can be detonated by a 50 mm jet source,resulting in detonation reaction.When exposed to an explosion height equal to 3 or 5 times its own diameter,a PBX charge with shell can be detonated by 81 mm jet source;however,no detonation reaction occurs if the explosion height is increased to 8 times its own diameter.When the PBX undergoes a complete detonation reaction,the shock wavepressure at the bottom of the projectile reaches 23 GPa,and the stress wave strength at a distance of 100 mm from the top of the steel column at the bottom of the projectile is 600 MPa.The simulation results demonstrate excellent agreement with corresponding experimental findings.Concurrently,the critical explosive heights of jet source impact shell charge with 50 mm and 81 mm shaped covers are 9 and 7 times greater their diameters,respectively.This indicates that the caliber jets diameter has a greater influence on its inherent damage capability compared to the explosion height.When the remaining energy of the jet flow penetrating the casing exceeds 38.4 mm 3/μs^(2),it will trigger a detonation reaction.

关 键 词：爆炸力学 带壳PBX装药 聚能射流 冲击波压力 反应烈度 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O38[理学—流体力学]