聚脲涂覆大型钢制储罐抗冲击性能数值仿真  

Resistance of polyurea coated large-scale steel storage tanks to impact loadings

作　　者：张博一[1] 蒋月新 翟德保 王伟[1] ZHANG Boyi;JIANG Yuexin;ZHAI Debao;WANG Wei(Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology),Ministry of Education,Harbin 150090,China;School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China;Bohai Shipyard Co.,Ltd.,Huludao 125000,Liaoning,China)

机构地区：[1]结构工程灾变与控制教育部重点实验室(哈尔滨工业大学),哈尔滨150090 [2]苏州科技大学土木工程学院,江苏苏州215009 [3]渤海造船厂集团有限公司,辽宁葫芦岛125000

出　　处：《哈尔滨工业大学学报》2024年第6期44-51,共8页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51778196);黑龙江省联合引导项目(LH2020E058)。

摘　　要：为提高大型钢制储罐抗冲击性能,开展聚脲涂覆大型钢制储罐冲击响应的数值模拟和理论分析研究。基于前期工作已验证的数值模型,建立聚脲涂覆钢罐的有限元模型。数值模拟结果表明:将聚脲涂覆于罐体外表面能有效降低冲击载荷作用下局部塑性变形,在冲击体撞击角度为45°时能避免罐体穿孔破坏;聚脲涂层的主要防护机制为降速和垫层作用;提高喷聚脲涂厚度能增加罐体最大吸能值和面密度吸能值;当涂层厚度为15 mm时罐体不产生穿透破坏,满足英国储罐设计规范要求。根据罐体冲击响应特征和聚脲涂层作用机制,建立预测罐体断裂临界冲击速度的理论公式,能较精确预测涂覆罐的最大吸能值,可为聚脲涂覆钢制储罐抗冲击防护设计提供科学参考依据。In order to improve the impact resistance of large steel tanks,this paper conducts numerical simulation and theoretical analysis research on the impact response of polyurea coated large steel storage tanks.The finite element model of polyurea-coated steel tank is established based on the model developed and validated in previous studies.Numerical results show that external polyurea layers can effectively reduce the local plastic deformation and avoid the perforation damage induced by impact loadings with the angle of 45°.The main mechanism of polyurea coatings are speed reduction and cushion effect.The maximum energy absorption and energy absorption efficiency of the tanks increase with the polyurea layers′thickness.When the coating thickness is 15 mm,the tank does not be damaged with penetration,meeting the requirements of the British tank design code.According to the tank′s impact response characteristics and the polyurea coating′s mechanism,a theoretical formula for predicting the critical impact velocity is established,which can predict the maximum energy absorption value of the coating tank with a small error,and can be used as a basis for the impact protection design of polyurea coated steel tanks.

关 键 词：钢制储罐 冲击 聚脲 数值模拟 预测公式 

分 类 号：O383[理学—流体力学]