Safety of underground ammunition storage is an important issue, especially during the accidental ignition of missiles. This work investigates the pressure and temperature distribution of the multi-layer underground ammunition storage with a pressure relief duct during the accidental ignition process of the missile. A large-scale experiment was carried out using a multi-layered restricted space with a pressure relief duct to simulate the underground ammunition store and a solid rocket motor to simulate the accidental ignition of the missile. The results show that when the motor gas mass flow increased by 5.6 times, the maximum pressure of the ammunition storage increased by 5.87 times. At a certain motor flow rate, when the pressure relief exhaust area at the end of the relief duct was reduced by 1/2, the maximum pressure on the first layer did not change. But the rate of pressure relief was reduced and the time delayed for the pressure of ammunition store to drop to zero. In this experiment, when the motor ignition position was located in to the third layer ammunition chamber, the maximum pressure was reduced by 32.9% and also reduced the rate of change of pressure. In addition, for the experimental conditions, the theoretical analysis of the pressure relief of the ammunition storage is given by a simplified model. Based on the findings, some suggestions to the safety protection design of ammunition store are proposed.

地下弹药储存的安全是一个重要问题，尤其是在导弹意外点火期间。这项工作研究了在导弹意外点火过程中带有泄压导管的多层地下弹药储存器的压力和温度分布。使用带有减压通道的多层受限空间进行了大规模实验，以模拟地下弹药储存，并使用固体火箭发动机模拟导弹的意外点火。结果表明，当电动机气体质量流量增加5.6倍时，弹药库的最大压力增加了5.87倍。在一定的电动机流量下，当泄压通道末端的泄压排气面积减少了1/2时，第一层的最大压力没有变化。但是，泄压率降低了，弹药储存压力降至零的时间也有所延迟。在该实验中，当电动机点火位置位于第三层弹药室中时，最大压力降低了32.9％，并且还降低了压力的变化率。另外，对于实验条件，通过简化模型给出了弹药储存压力释放的理论分析。在此基础上，对弹药库的安全防护设计提出了一些建议。当电动机点火位置位于第三层弹药室中时，最大压力降低了32.9％，并且还降低了压力的变化率。另外，对于实验条件，通过简化模型给出了弹药储存压力释放的理论分析。在此基础上，对弹药库的安全防护设计提出了一些建议。当电动机点火位置位于第三层弹药室中时，最大压力降低了32.9％，并且还降低了压力的变化率。另外，对于实验条件，通过简化模型给出了弹药储存压力释放的理论分析。在此基础上，对弹药库的安全防护设计提出了一些建议。