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为了控制地震作用下LNG储罐流体的晃动幅度,选取16万m3LNG储罐为研究对象,应用ADINA有限元软件,采用CFD方法分别建立无环板和有环板储罐的三维结构模型及相应的流体模型,进行在水平地震激励下的地震响应计算。通过改变环板在内罐壁上的高度和宽度等参数,分析环板的防晃效果以得到最优设计。结果表明:环板位置越靠近自然波高峰值,波高降低越明显;随着环板宽度变大,波高先降低后升高;液面下0.8m处2~3m宽的环板,防晃效果较好。建议采用环形挡板进行防晃设计时,对其进行优化设计。
In order to control the sloshing amplitude of LNG storage tank under earthquake, 160,000 m3 LNG storage tank was selected as the research object. Three-dimensional structural model of the ring-less and ring-plate storage tank was established by using ADINA finite element software and CFD method respectively Fluid model for seismic response calculation under horizontal seismic excitation. By changing the ring plate in the tank wall height and width and other parameters, analyze the anti-slipping ring plate effect in order to get the best design. The results show that the closer the ring plate is to the peak value of natural wave, the more obvious the wave height decreases. The wave height decreases firstly and then increases with the increase of ring plate width. The ring plate with width of 2 ~ it is good. It is recommended to use annular baffles for anti-wobble design, to optimize its design.