The production and storage of liquefied petroleum gas (LPG) is gradually becoming larger and more intensive, which greatly increases the risk of the domino effect of an explosion accident in a storage tank area while improving production and management efficiency. This paper describes the construction of the domino effect scene of an explosion accident in an LPG storage tank area, the analysis of the characteristics of the LPG tank explosion shock wave and the target storage tank failure, and the creation of an ANSYS numerical model to derive the development trend and expansion law of the domino accident in the LPG storage tank area. The research showed that: 400 m³ tank T1 explosion shock waves spread to T2, T4, T5, T3, and T6, and the tank overpressures of 303 kPa, 303 kPa, 172 kPa, 81 kPa, and 61 kPa respectively. The critical values of the target storage tank failure overpressure-range threshold were 70 kPa and 60 m. After the explosion of the initial unit T1 tank, at 38 ms, the T2 and T4 storage tanks failed and exploded; at 56 ms, the T5 storage tank exploded for the third time; at 82 ms, the T3 storage tank exploded for the fourth time; and at 102 ms, the T6 storage tank exploded for the fifth time. With the increase of explosion sources, the failure overpressure of the target storage tank increased, and the interval between explosions continuously shortened, which reflected the expansion effect of the domino accident. The domino accident situation deduction in the LPG storage tank area provided a scientific basis for the safety layout, accident prevention and control, emergency rescue, and management of a chemical industry park.

液化石油气（LPG）的生产和储存逐渐规模化和集约化，在提高生产和管理效率的同时，大大增加了储罐区发生爆炸事故的多米诺骨牌效应风险。本文介绍了液化石油气储罐区爆炸事故多米诺骨牌效应场景的构建，分析了液化石油气储罐爆炸冲击波和目标储罐失效的特征，并建立了ANSYS数值模型推导LPG储罐区多米诺事故的发展趋势及扩张规律。研究表明：400 m ³T1储罐爆炸冲击波波及T2、T4、T5、T3、T6，储罐超压分别为303 kPa、303 kPa、172 kPa、81 kPa和61 kPa。目标储罐故障超压范围阈值的临界值为 70 kPa 和 60 m。初始单元T1储罐爆炸后，在38ms时，T2和T4储罐失效并发生爆炸；56ms，T5储罐第三次爆炸；82ms，T3储罐第四次爆炸；在 102 毫秒时，T6 储罐第五次爆炸。随着爆炸源的增加，目标储罐的失效超压增大，爆炸间隔不断缩短，体现了多米诺事故的膨胀效应。