A study of fluid-structure interaction dynamic response for reinforced liquid storage tank with internal components postprint

Abstract:
The dynamic characteristics of the reinforced liquid storage tank and its dynamic response behavior under seismic load were tested and calculated by using the scale model experiment and the acoustic-structure coupling method.The finite element model of the reinforced liquid storage tank with internal components under the condition of “non-entire” anchorage was established.The dynamic characteristics of the reinforced liquid storage tank under different liquid level heights and the dynamic response under seismic load and the lift-off phenomenon of the tank bottom relative to the ground were numerically analyzed,and the influence law of the internal components on the fluid-structure interaction dynamic response of the liquid storage tank was revealed.The results show that the natural frequency of the system decreases with the increase of liquid level,and the effect of liquid on the stiffening of tank wall is greater than the effect of added mass at some liquid level.Under the action of seismic load,the lower half structure of the liquid storage tank bears greater dynamic stress,and the liquid in the tank inhibits the swing of the internal components and the lift-off of the tank bottom relative to the ground,and with the rise of the liquid level,the liquid has more obvious inhibition on the swing of the internal component at the center of the tank and the lift-off of the tank bottom.The present method and research results have important reference value for the design of the liquid storage tank structure under horizontal seismic load.