Blast wave and fragment are two main types of physical damage effects representing a significant threat to storage tank structures in chemical industrial parks. Compared with the effect of only blast wave or fragment, the coupling effect of them may cause more severe consequences and is worthy of study. A numerical study of the dynamic responses and damage of a vertical storage tank subjected to the coupling effect of blast wave and fragment is conducted based on a typical accident. The simulation results reveal that stress-concentration and rapid increase of the stress exist in the impacted region of the storage tank under the coupling effect, which leads to the structural damage of the tank exhibiting different failure modes. The coupling effect is significantly apparent following a dramatic increase of the plastic strain, and the damage of the storage tank is further aggravated. From the displacement response and energy absorption, the overall damage of the storage tank subjected to the coupling effect is more severe than that caused by blast wave and fragment separately, which also indicates that the coupling effect is an enhanced damage effect. Besides, the contribution of blast wave and fragment to the coupling effect depends on scaled distance. The results of the study help reveal the coupling effect of blast wave and fragment and prevent domino accidents caused by the coupling effect.

冲击波和碎片是两种主要的物理破坏效应，对化工园区的储罐结构构成重大威胁。与只有冲击波或破片的作用相比，它们的耦合作用可能造成更严重的后果，值得研究。以典型事故为基础，对冲击波与破片耦合作用下立式储罐的动力响应和损伤进行了数值研究。仿真结果表明，在耦合作用下，储罐受冲击区域存在应力集中和应力快速增大，导致储罐结构破坏呈现不同的失效模式。随着塑性应变的急剧增加，耦合效应非常明显，进一步加剧了储罐的损坏。从位移响应和能量吸收来看，耦合效应对储罐的整体损伤比冲击波和破片分别造成的损伤更严重，这也说明耦合效应是一种增强的损伤效应。此外，冲击波和碎片对耦合效应的贡献取决于缩放距离。研究结果有助于揭示冲击波与破片的耦合效应，防止由耦合效应引起的多米诺骨牌事故。这也表明耦合效应是一种增强的损伤效应。此外，冲击波和碎片对耦合效应的贡献取决于缩放距离。研究结果有助于揭示冲击波与破片的耦合效应，防止由耦合效应引起的多米诺骨牌事故。这也表明耦合效应是一种增强的损伤效应。此外，冲击波和碎片对耦合效应的贡献取决于缩放距离。研究结果有助于揭示冲击波与破片的耦合效应，防止由耦合效应引起的多米诺骨牌事故。