Dynamic Characteristic Analysis And Dynamic Response Of Liquid-storage Tank

Vertical liquid-storage tank are important facilities in oil storage and transportation.Recently, with the rapid development of petroleum chemistry industry, more and moreliquid-storage tanks have been built. China locates in an area with high-frequency ofearthquakes. Furthermore, most of liquid-storage tanks were built in the seismic area.Therefore, it is important to research the seismic response of the liquid-storage tanks. Atpresent, the tank’s developments are thin wall, base floating and large volume.Liquid-storage tanks with floating-roof are primary equipments for oil storage, and thetank bodies are placed on bases freely. The research of tank’s seismic response is focuson unanchored tanks which have the widest application.In this thesis, the finite element software ANSYS has been applied in static andseismic response analysis of liquid-storage tanks. The main research and achievementare given as follows:Part1: The finite element model of liquid storage tank with soil structureconsidering nonlinear contact is built, and the time acceleration method is chosen by thecharacteristics of different seismic wave inputting methods.Part2: The modal analysis is preceded for the tank. At the same time, the influenceanalysis of parameters is processed which include the tank wall style.Part3: The analysis of dynamic response of the tank under the horizontalearthquake is given out. The analysis includes the height of sloshing wave, the stressand the displacement of the tank wall, the uplifting of the base plate. At the same timethe seismic response of anchored tanks are analyzed, and the results are compared withunanchored tanks.