聚脲喷涂钢制罐体抗爆性能试验及数值模拟研究

Experimental and numerical simulation study on blastresistance capacity of polyurea sprayed steel tank

为考查聚脲涂层对钢制罐体抗爆能力的增强效果,对内侧喷涂聚脲涂层的缩尺模型罐和无涂层模型罐进行两次地面爆炸试验,并采集罐体测点位移时程及残余变形等响应数据。采用LS-DYNA软件中的ALE流固耦合分析方法对罐体的爆炸响应过程进行有限元模拟,并考查涂层粘接设定、罐体材料及涂层厚度对涂层防护效果的影响。试验结果表明,内侧喷涂聚脲涂层能显著降低罐体的最大位移及残余变形。数值模拟结果表明,聚脲涂层与钢板间的不同接触设置对罐体位移峰值的影响可以忽略,而对罐体残余位移影响较大;随着钢材屈服强度的提高,聚脲涂层位移的降低率逐渐减小;增大涂层厚度可减小罐体变形,但带来的增益不断降低。

To investigate the enhancement effect of polyurea coating on the blast-resistance capacity of steel storage tanks,two ground explosion experiments were carried out in this study via the scale model steel tanks with polyurea coating sprayed inside and uncoated steel tanks,and the response data such as displacement timehistory and residual deformation of the measuring point of the tanks were collected.Meanwhile,ALE fluid-solid coupling analysis method in LS-DYNA software was used to simulate the explosion response process of the tanks,and the influence of different coating connection settings,tank materials and coating thickness on the coating protection effect was investigated.The test results show that the inner spray polyurea coating can significantly reduce the maximum displacement and residual deformation of the tanks.The numerical simulation results show that the influence of different connection settings between the polyurea coating and the steel plate on the peak displacement of the tanks is negligible,while the influence on the residual displacement of the tanks is great.At the same time,with increase of steel yield strength,the displacement reduction ratio of polyurea coating decreases gradually.Increasing the coating thickness can reduce the deformation of tank.Howerer,the enhancement effect decreases continuously.