不同机械约束下压装PBX炸药反应演化行为  

Reaction Evolution Behaviors of Pressed Plastic-Bonded Explosive(PBX)under Different Mechanical Confinement Conditions

作　　者：姚奎光 王淑娟[1] 樊星[1] 聂少云[1] 王翔[1] 代晓淦[1] YAO Kuiguang;WANG Shujuan;FAN Xing;NIE Shaoyun;WANG Xiang;DAI Xiaogan(Institute of Chemical Materials,CAEP,Mianyang 621999,Sichuan,China)

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621999

出　　处：《兵工学报》2022年第8期1772-1778,共7页Acta Armamentarii

基　　金：国家自然科学基金项目(11902301)。

摘　　要：为研究机械约束下炸药反应演化行为,加深对武器装药意外点火后反应烈度演化影响因素及机制的认识,对压装PBX炸药反应演化过程进行实验研究。设计一种机械约束装药点火实验装置,采用激光干涉仪和压力传感器分别测量壳体膨胀速度和内部压力,分析不同约束下两种HMX基压装PBX炸药装药的反应演化行为;结合空气冲击波超压测试结果和装置、炸药残骸回收分析,表征装药的反应烈度。研究结果表明:2 MPa机械约束下,PBX-1和PBX-2装药反应最高压力不超过200 MPa,壳体膨胀速度在70 m/s左右,装药反应烈度为爆燃;50 MPa机械约束下,PBX-1和PBX-2装药在百微秒甚至几十微秒内压力超过1 GPa,壳体膨胀速度达到500 m/s,装药发生爆炸反应;不同炸药的力学性能会造成装药反应演化过程存在一定差异,但机械约束影响更明显,新装置2 MPa和50 MPa机械约束装药反应压力和约束壳体速度相差接近1个数量级。An experimental study was conducted to investigate the effect of mechanical confinement on the reaction behavior and mechanism of explosives,in which different confined charges of HMX based pressed PBXs were ignited at the center of the bottom surface via non-shock initiation with a newly designed mechanically confined charge ignition experimental device.The reaction violence was characterized by the reaction pressure and confinement disc velocity,while overpressure and recovery fragments were also analyzed.The results showed that:under 2 MPa mechanical confinement,charge deflagration occurred,where the maximum pressure of PBX-1 and PBX-2 charges were about 200 MPa,and the expansion velocity of the confinement disc were about 70 m/s;under 50 MPa mechanical confinement,charge explosion occurred,where the pressure of PBX-1 and PBX-2 charges exceeded 1 GPa in hundreds or even tens of microseconds,and the expansion velocity of the confinement disc reached 500 m/s;the physical properties of PBXs may cause some differences in reaction evolution,but the influence of mechanical confinement is more obvious;the reaction pressure and confinement dics velocity differed by almost one order of magnitude under 2 MPa and 50 MPa mechanical confinement using the designed device.

关 键 词：压装PBX炸药 机械约束 反应演化 烈度 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O381[理学—流体力学]