中文摘要：

通过模型实验与数值模拟结果对比,探讨了浮顶油罐在可燃蒸气云爆炸冲击作用下的变形过程和破坏机理。研究发现,罐体失稳破坏的主要原因与爆炸冲击波和油罐内液体的复合冲量作用有关,在爆炸冲击作用下浮顶油罐模型产生剧烈振动,迎爆面上部罐壁形成动应力集中现象,最终导致罐体失稳并产生内凹动力屈曲破坏。

英文摘要：

The failure mode and mechanism of floating-roof oil storage tanks under the blast impact through the combustible gas explosion were discussed, on the basis of the scaled model tests and the numerical simulations comprehensively. It is found that the coupled impact effect of the blast wave and the liquid resulted in the bulking failure and damage of the oil storage tank body. In the process of the violent vibration, the stress concentration appeared on the upper area of the scaled model, and the tank body lost its stability and generated the concave formation and dynamic buckling area.