Shockwaves from fuel-air explosive (FAE) cloud explosions may cause significant casualties. The ground overpressure field is usually used to evaluate the damage range of explosion shockwaves. In this paper, a finite element model of multi-sources FAE explosion is established to simulate the process of multiple shockwaves propagation and interaction. The model is verified with the experimental data of a fourfold-source FAE explosion, with the total fuel mass of 340 kg. Simulation results show that the overpressure fields of multi-sources FAE explosions are different from that of the single-source. In the case of multi-sources, the overpressure fields are influenced significantly by source scattering distance and source number. Subsequently, damage ranges of overpressure under three different levels are calculated. Within a suitable source scattering distance, the damage range of multi-sources situation is greater than that of the single-source, under the same amount of total fuel mass. This research provides a basis for personnel shockwave protection from multi-sources FAE explosion.

来自燃料空气炸药 (FAE) 云爆炸的冲击波可能会造成重大人员伤亡。地面超压场通常用于评价爆炸冲击波的破坏范围。本文建立了多源FAE爆炸的有限元模型来模拟多个冲击波的传播和相互作用过程。该模型通过四重源 FAE 爆炸的实验数据进行验证，总燃料质量为 340 kg。仿真结果表明，多源FAE爆炸的超压场与单源不同。在多源情况下，超压场受源散射距离和源数量的影响显着。随后，计算了三个不同级别下的超压损坏范围。在合适的源散射距离内，在总燃料质量相同的情况下，多源情况的破坏范围大于单源情况。该研究为人员冲击波保护免受多源 FAE 爆炸的影响提供了依据。