首页|不同起爆条件下双钢壁LNG储罐抗爆性能分析

不同起爆条件下双钢壁LNG储罐抗爆性能分析

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  • 国家科技期刊平台
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由于双钢壁储罐具有建造周期短、投资小等优点,在LNG储存中应用越来越广泛,但其易在外罐受到外部冲击时引发内罐的破坏.为了分析储罐在不同外爆载荷条件下的破坏行为,以双钢壁LNG储罐为研究对象,考虑内、外罐及保冷材料之间的载荷传递与相互作用,建立了外罐-保冷材料-内罐多介质的多相耦合有限元模型,并对多影响因素下储罐在外爆载荷作用下的破坏进行了分析,探究其抗爆性能.结果表明:在外爆载荷作用下,内、外罐从迎爆面中心向内凹陷直至发生破坏,最大应力均在迎爆面中心,且越靠近中心应力值越大;内、外罐材料均先达到屈服强度后发生塑性变形,随后达到失效应变值并发生破坏;与外罐相比,内罐发生破坏的时间晚42.9％,变形范围和破坏范围分别小12.3％、6.7％;储罐的抗爆性能随着储存液位的升高和罐体容积的增大而增强,随着起爆位置从罐壁中心向上、下两侧移动而提高,在罐壁中心起爆时储罐的破坏程度最大.该研究成果可为双钢壁LNG储罐的设计和储存液位的控制等方面提供理论参考依据.
Analysis of anti-explosion performance of LNG storage tank with double steel walls under different initiation conditions
Due to the advantages of short construction cycle and low investment,LNG tank with double steel walls are used more and more widely in LNG storage.However,it is easy to cause damage to the inner tank when the external impact affects the outer tank.In order to analyze the destruction behavior of the storage tank under different external explosive loads,taking LNG storage tank with double steel walls as the research object,considering the load transfer and interaction between the inner tank,the outer tank and the cold retaining material,a multi-medium multi-phase coupling finite element model of the outer tank,es-tablishing the cold retaining material and the inner tank.Through the analysis of the damage of the storage tank under the external explosion load with multiple influencing factors,its anti-explosion performance is explored.The research results show that under the action of external explosion load,the inner and outer tanks sag inward from the center of the explosion surface to the damage,and the maximum stress is at the center of the explosion surface,and the closer to the center,the greater the stress value.Both internal and external tank materials first reach the yield strength and undergo plastic deformation,and then reach the failure strain value.Compared with the outer tank,the failure time of the inner tank is 42.9％later,and the de-formation range and failure range are 12.3％and 6.7％smaller,respectively.The anti-explosion performance of the storage tank is enhanced with the increase of the storage level and the volume of the tank,and improved with the initiation position moving from the center of the tank wall to the upper and lower sides.The tank damage degree is the largest when detonating on the center of the tank wall.The research results can provide theoretical reference for the design of LNG storage tanks with double steel walls and the control of storage level.

LNG storage tank with double steel wallsanti-explosion performance analysisexplosion loadmulti-phase coupling finite element modelfailure criterion

于双锴、李晓琳、芦烨、丁宇奇、尹青锋、李巧珍、谢清

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东北石油大学机械科学与工程学院,黑龙江 大庆 163318

中国石化工程建设有限公司,北京 100101

双钢壁LNG储罐 抗爆性能分析 外爆载荷 多相耦合有限元模型 失效准则

"十四五"国家重点研发计划项目黑龙江省自然科学基金项目黑龙江省博士后科研启动基金项目

2021YFC3001202LH2022A003LBH-Q20082

2024

10.13578/j.cnki.issn.1671-1556.20221239

安全与环境工程
中国地质大学

安全与环境工程

CSTPCD北大核心
影响因子：1.03
ISSN：1671-1556
年,卷(期)：2024.31(4)
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