大型LNG全容罐竖向地震作用分析  

Analysis of large full containment LNG tank under vertical seismic action

作　　者：余晓峰 Yu Xiaofeng(SINOPEC Luoyang Engineering Co.,Ltd.,Luoyang,Henan 471003)

机构地区：[1]中石化洛阳工程有限公司,河南省洛阳市471003

出　　处：《炼油技术与工程》2020年第6期39-44,共6页Petroleum Refinery Engineering

摘　　要：大型LNG储罐地震作用下的研究至关重要。目前国内外对水平地震作用研究较多,但LNG储罐竖向地震作用下的研究很少。文中首先探讨了LNG混凝土储罐模态分析的理论方法,指出流固耦合模态分析的有效性;其次建立竖向地震流固耦合有限元数值模型,得到了LNG储罐竖向地震作用下特有的穹顶呼吸模态,此模态周期0.143 s,地震力大;最后,研究了在实际工程中的160 dam^3LNG储罐的地震反应谱,得到了底板、罐壁和穹顶的受力,且比较了竖向和水平地震的计算结果,竖向地震对穹顶影响较大。指明不能忽视竖向地震作用,为后续储罐结构的力学分析及工程设计打下了基础。It is very important to study the seismic effects of large LNG tanks.At present,there are many researches on horizontal earthquake at home and abroad.However,there are few studies on LNG storage tanks under vertical seismic action.So the methods of the LNG concrete tank mode analysis are discussed firstly,and then the advancement of the fluid-solid interaction model analysis is pointed out.Secondly,the finite element numerical model of vertical seismic fluid-solid interaction is established and the unique dome respiratory mode of LNG tank is obtained,which has a period of 0.143 s and large seismic force.Finally,The seismic response spectrum analysis of 160,000 cubic metres LNG tanks in practical engineering is studied,the forces on the floor,tank wall and dome are obtained,the results of the horizontal and the vertical seismic response spectrum are compared and the vertical seismic action cannot be ignored,because vertical earthquake has great influence on the roof.The method paves the way for the analysis of the LNG storage tank structure and lays the root for the establishment.

关 键 词：LNG全容罐 竖向地震 流固耦合 地震反应谱 

分 类 号：TE972[石油与天然气工程—石油机械设备]