为研究粒度对传爆药起爆性能的影响,对两种不同粒度奥克托今(HMX)为基的浇注传爆药开展冲击波起爆试验,采用锰铜压力传感器测试了起爆过程中的压力变化。结果表明:在密度和固相含量相同的条件下,细粒度HMX为基的PBX-5C传爆药冲击波起爆临界压力为8.24GPa,低于粗粒度HMX为基的PBX-4C传爆药;在9.91GPa起爆压力下,PBX-4C爆轰增长距离为13.5～18.5mm,PBX-5C爆轰增长距离为6～10mm;爆轰增长距离随着起爆压力的增加而逐渐减小;在各自临界起爆压力下,PBX-4C点火距离小于PBX-5C;在起爆压力相同时,细粒度传爆药呈现爆轰增长时间短,爆轰成长距离较小的特点。

In order to investigate the pacticle size's influence on initiation of the booster explosives,the shock wave initiation expertiment were did on the two booster explosives with different HMX particles,and the manganin pressure resistance sensor were used to test the pressure variance of the initiation.Results showed that:under the same density and solid content,the PBX-5C's shock wave critical initiation pressure was 8.24GPa,which was lower than that of the PBX-4C whose shock wave critical initiation pressure was 9.87GPa.When the incoming pressure was 9.91GPa,the detonation-induced distance of PBX-4C was 13.5～18.5mm,while that of the PBX-5C was 6～10mm.It was found that with the increasing of incoming pressure,the detonation-induced distance decreased.Under their respective critical initiation pressure,the ignition distance of PBX-4C was less than that of PBX-5C.In conclusion,with the same incoming pressure,booster explosive with the fine HMX particle had shorter detonation time and less detonation distance compared to booster explosive with coarse particle.