1.西安机电信息技术研究所 近感探测与控制全国重点实验室,西安 710065
2.北京理工大学 爆炸科学与安全防护全国重点实验室,北京 100081
收稿:2026-02-11,
修回:2026-07-09,
录用:2026-07-14,
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董理赢, 范晨阳, 朱俊伍, 等. 两级带壳推进剂装药跌落-刺入点火响应研究[J/OL]. 兵工学报, 2026,1-14.
DONG Liying, FAN Chenyang, ZHU junwu, et al. Study on Drop–Penetration Ignition Response of a Two-Stage Cased Propellant Charge[J/OL]. ACTA ARMAMENTARII, 2026, 1-14.
董理赢, 范晨阳, 朱俊伍, 等. 两级带壳推进剂装药跌落-刺入点火响应研究[J/OL]. 兵工学报, 2026,1-14. DOI: 10.12382/bgxb.2026.0150. CSTR: XXXXX.XX.XXX.2026.0150.
DONG Liying, FAN Chenyang, ZHU junwu, et al. Study on Drop–Penetration Ignition Response of a Two-Stage Cased Propellant Charge[J/OL]. ACTA ARMAMENTARII, 2026, 1-14. DOI: 10.12382/bgxb.2026.0150. CSTR: XXXXX.XX.XXX.2026.0150.
两级带壳推进剂装药跌落异常点火的准确预测对两级发动机的安全性评估和工程应用具有重要意义。首先基于高速相机分析了两级带壳推进剂装药跌落过程。其次将构建的动态损伤本构模型和宏细观点火判据嵌入到LS-DYNA子程序,对两级带壳推进剂装药跌落过程进行模拟,分析前封头断裂和缓冲层对装药应力状态、损伤演化及点火响应的影响。结果表明,前封头断裂(
v
≥9 m/s)导致该位置装药产生应力集中,使得装药内部发生粘性摩擦生热进而引起点火,且过厚或过薄的前封头均不利于提高装药安全性。高模量缓冲层(10
2
~10
3
MPa,如聚碳酸酯、聚四氟乙烯)会作为毁伤元加剧装药点火风险;而低模量缓冲层(10
0
MPa,如三元乙丙橡胶、丁腈橡胶)能改善装药局部能量分布和载荷输入,降低剪切变形,有效减少意外点火情况。
Accurate prediction of abnormal ignition in two-stage cased propellant charges under drop-induced penetration is crucial for safety assessment and engineering application of multi-stage motors. First, the drop process of the two-stage cased propellant charge was analyzed using high-speed cameras. Next, a dynamic damage constitutive model and a macro-micro ignition criterion were embedded into the LS-DYNA subroutine to simulate the drop process, focusing on the effects of front he
ad fracture and buffer layers on the propellant's stress state, damage evolution, and ignition response. The results show that front head fracture (
v
≥ 9 m/s) causes stress concentration at this location, inducing viscous frictional heating within the propellant and leading to ignition. Both excessively thick and thin front heads are detrimental to improving propellant safety. A high-modulus buffer layer (10
2
~10
3
MPa, such as PC or PTFE) acts as a damage element, exacerbating the ignition risk. In contrast, a low-modulus buffer layer (10
0
MPa, such as EPDM or NBR) improves the local energy distribution and load input, reduces shear deformation, and effectively mitigates the potential for accidental ignition.
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