Steel tanks are used in industries for several purposes, such as the storage of chemicals, water, oil, petroleum products, etc. These steel tanks are frequently exposed to internal explosions due to flammable vapor clouds and external explosives. Generally, two types of blast loads are identified, including surface blast load and air blast load. The air blast load is classified into cylindrical and spherical charges. This study attempted the air blast load mitigation of steel tanks using polyurea coating. A numerical model was developed to evaluate the response of the steel tank under air blast load in terms of internal energy, kinetic energy, strain energy, von-Mises stress, normalized base shear, and side overpressure response. In this regard, two different thicknesses (3.5 and 4.0 mm) of the polyurea coating were used. The model was successfully validated utilizing the previous experimental data. The numerical results indicated that the blast mitigation of steel tanks was effectively enhanced by applying the polyurea coating. In addition, the blast resistance increased with the increase in the thickness of the coating, where a reduction of 70% and 72% in displacements under different air blast loads were observed at the polyurea layer's thicknesses of 3.5 and 4.0 mm, respectively.

钢罐在工业中用于多种用途，例如储存化学品、水、油、石油产品等。由于易燃蒸气云和外部爆炸物，这些钢罐经常受到内部爆炸的影响。通常，确定两种类型的爆炸载荷，包括表面爆炸载荷和空气爆炸载荷。空气爆破载荷分为圆柱装药和球形装药。本研究尝试使用聚脲涂层减轻钢罐的空气冲击载荷。建立了一个数值模型来评估钢罐在空气冲击载荷下的内能、动能、应变能、von-Mises 应力、归一化基础剪切和侧面超压响应方面的响应。在这方面，使用了两种不同厚度（3.5 和 4.0 毫米）的聚脲涂层。利用先前的实验数据成功验证了该模型。数值结果表明，聚脲涂层有效地增强了钢罐的爆炸缓解能力。此外，随着涂层厚度的增加，抗爆破性能增加，其中在聚脲层厚度为 3.5 和 4.0 mm 时，在不同的空气冲击载荷下，位移分别减少了 70% 和 72%。