Safety analysis of large membrane-roofed enamel assembled storage tanks based on finite element equivalent modeling
In order to improve the safety of the storage tank,the equivalent analysis model of large membrane-roofed tanks was established to analyze the stress and deformation of the tank wall plate and its components under different working conditions,the influences of the law of the number of tensile strips,the height of the center column,etc.on the tank's stress and deformation were investigated,and their optimal values were obtained.The results show that under the extreme working conditions such as the membrane-roofed assembled tank without gas production and the influence of rain and snow,the tank wall and the wind girder failed,and it is needed to optimize the structure of the tank in order to improve the safety of the tank;The number of tensile strips and the height of the center column are the main factors affecting the safety of the tank.When the number of tensile strips is increased to 80,and the angle between the center column and the tensile strips is increased to 77.5°,which can effectively improve the safety of the tank;The thickness of the first layer of the wall plates and the membrane pressure have been the optimal value,and meet the safety requirements of the tank.The conclusions obtained provide reference for the design of subsequent spliced tanks and improve the reliability of the spliced tanks.
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