为研究LLM-105基战斗部装药的热安全性问题,建立了缩比战斗部烤燃试验的简化有限元模型,并结合Frank-Kamenetskii反应模型,采用FLUENT仿真软件,分别开展了不同升温速率、不同壳体壁厚以及不同缓冲层厚度条件下的烤燃数值模拟。结果表明,升温速率从0.055 K/min增加至10 K/min,战斗部装药的点火温度由576.7 K降低至537.7 K,装药的点火区域由头部转移至装药尾部与端盖的交界处;壳体壁厚由10 mm增加至20 mm时,装药的点火时间缩短了214 s,装药的点火温度变化了14 K;当烤燃时间为13 000 s时,不同缓冲层厚度对点火温度和点火区域的影响不大。研究结果可以为评估超声速武器战斗部装药的热安全性提供一定理论支撑。

In order to study the thermal safety of the warhead charge based on the LLM-105, the simplified finite element model of the scaled warhead cook-off test was established. By applying FLUENT simulation software and combining with the Frank-Kamenetskii reaction model, the numerical simulation of cook-off test under different heating rates, shell thickness and buffer layer thickness were carried out. The results show that as the heating rate increases from 0.055 K/min to 10 K/min, the ignition temperature of the warhead charge decreases from 576.7 K to 537.7 K, meanwhile the ignition zone of the warhead charge transfers from the head to the junction between charge tail and the end cover. When the shell thickness increases from 10 mm to 20 mm, the charge ignition time is reduced by 214 s and the ignition temperature of the charge changed by 14 K.When the cook-off time is 13 000 s, different buffer thickness has little effect on ignition temperature and ignition region. The research results can provide technical support for evaluating the thermal safety of warhead charge of supersonic weapons.