冲击荷载作用下LNG混凝土储罐力学性能分析  

Mechanical Analysis of LNG Prestressed Concrete Tank for Blast Loading

作　　者：苏娟[1] 刘玉玺[1] 荆潇[1] 李雯静[1] 刘立静[1] 

机构地区：[1]海洋石油工程股份有限公司,天津300451

出　　处：《中国造船》2012年第A02期241-248,共8页Shipbuilding of China

摘　　要：由于冲击荷载值是变化的,作用时间是短暂的,因此在冲击荷载作用下液化天然气储罐的响应分析为动力学问题。借助于ANSYS有限元软件,对冲击荷载作用下LNG混凝土储罐的力学性能进行了数值模拟.计算中考虑了空罐和满罐两种工况,对LNG混凝土储罐的有限元建模、约束处理作了分析与探讨,在此基础上进行了冲击荷载作用下LNG混凝土储罐的动态响应分析,得到了储罐各控制点的内力随时间变化的曲线.该结果对LNG储罐抗冲击分析研究和设计具有指导意义。The analysis of the LNG prestressed concrete tank under the blast load is a dynamic problem, because of the variability of the load value and the temporality of its action time. In this paper the mechanical properties of LNG concrete tank under the blast load are numerically analyzed with the time-history analysis method. Both the full-tank condition and the empty-tank condition are analyzed. The FEM model and the constraint condition are analyzed and discussed respectively. Further more, the analysis of dynamic response of the LNG concrete tank are done in two different conditions and the time-history curves of the intemalforce are gotten. This paper provides reference for the design of the LNG concrete tank and the analysis of the LNG concrete tank under the blast load.

关 键 词：冲击荷载 LNG 储罐 有限元分析 动态分析 

分 类 号：TU411.3[建筑科学—岩土工程]