重复爆炸载荷下聚脲涂覆储罐的动力损伤研究  

Dynamic Damage of Polyurea-Coated Vertical Cylindrical Steel Storage Tanks Under Repeated Blast Loads

作　　者：曹杨昊 纪冲 王昕 王钰婷 朱浩杰 陶玉森 CAO Yanghao;JI Chong;WANG Xin;WANG Yuting;ZHU Haojie;TAO Yusen(College of Field Engineering,Army Engineering University of PLA,Nanjing 210007,China;Training Base,Army Engineering University of PLA,Xuzhou 220014,China)

机构地区：[1]陆军工程大学野战工程学院,江苏南京210007 [2]陆军工程大学训练基地,江苏徐州220014

出　　处：《陆军工程大学学报》2024年第4期78-85,共8页Journal of Army Engineering University of PLA

基　　金：国家自然科学基金面上项目(52278543)。

摘　　要：立式圆筒型钢制储罐作为常见的储油设施,在遭受重复爆炸等强动载作用时,罐体易发生整体变形或局部破坏失效,进而产生难以估量的损失。为了改善这一现状,采用聚脲喷涂的快速加工方式提升现有钢制储罐的抗爆能力,并对喷涂过后的复合型储罐开展了抗爆实验。实验结果表明,重复爆炸载荷作用下,储罐在涂覆聚脲后,迎爆面内凹屈服面横向宽度和最大挠度值分别减小12.3%和12.5%,表明聚脲层有效吸收了部分爆轰产物的能量。利用LS-DYNA进行数值模拟对实验进行复现,将数值模拟结果与实验在内凹屈服面的形状与罐壁塌陷深度两个方面进行比对,宏观上验证了数值模拟的可靠性。进一步探究可知,聚脲涂层减缓和弥散了重复爆炸载荷的局部强冲击,削弱了冲击波对罐壁的局部冲击压缩能力,弱化了在罐壁和焊缝处的应力集中,从而防止部分罐壁进入塑性阶段并产生局部失效。此外,聚脲涂层还减少了重复爆炸载荷作用下储罐27.8%峰值动能,减弱了储罐整体的塌陷程度,保护了储罐结构的完整性。Vertical cylindrical steel storage tanks,which are usually used as oil storage facilities,are prone to overall deformation or local damage failure in the event of blast or other strong dynamic loads,which will result in significant losses.In order to address this issue,this paper proposes a rapid processing method in which the polyurea spraying is applied to enhance the blast resistance of existing steel tanks,and some blast resistance experiments on sprayed composite tanks have been conducted.The experimental results demonstrate that the polyurea layer can effectively absorb a portion of the energy of the blast products under the action of repeated explosion loads,resulting in a reduction of 12.3%in the transverse width of the concave yield surface of the coated tank and a reduction of 12.5%in the maximum deflection value.A numerical simulation with LS-DYNA was employed to reproduce the experiment.The numerical simulation results were then compared with the experiment in terms of the shape of the concave yield surface and the depth of the tank wall collapse.The result of this comparison demonstrates that the numerical simulation is able to accurately reproduce the experiment,thereby providing evidence of its reliability.The further investigations reveals that the polyurea layer decreases and diffuses the localized strong impact of the repeated blast loads,reduces the local impact compression capacity of the shock wave on the tank wall,and attenuates the stress concentration on the tank wall and weld joints,which can prevent parts of the tank wall from entering the plastic phase and producing local failure.Furthermore,the polyurea layer can reduce the peak kinetic energy of the tank by 27.8%under the action of repeated explosive loads,reduce the overall degree of collapse of the tank,and protect the structural integrity of the tank.

关 键 词：钢制储罐 聚脲 重复爆炸 动力损伤 

分 类 号：TJ414.1[兵器科学与技术—火炮、自动武器与弹药工程]