Analysis Of Sloshing Interaction Between Tank And Inside Liquid Based On Stochastic Dynamic Mechanics

Large storage tanks are widely used in engineering practices,however,they may suffer serious destruction and huge losses in earthquake.Based on the stochastic dynamic mechanics,an decoupled and simplified analysis of sloshing interaction between tank and liquid is performed;meanwhile,mode analysis of the tank and liquid is conducted using ADINA;in addition,in order to simulate nonlinear coupled analysis of tank and liquid numerically,a software,which can be used to quickly produce a stochastic manmade-earthquake,is developed.The main contents are as following.Firstly,HAROUN-HOUSNER model and specification algorithm is used to calculate the frequency of liquid sloshing,fluid-solid coupling frequency,base shear and base overturning moment of the storage tanks.Additionally,the simplified and decoupling model of the storage tanks is established.Through the comparison with the standard algorithm,the form of random load which represents the liquid action can be get.Then,using the simplified and decoupling model,the fluid –solid coupling frequency,base shear and base overturning moment of the storage tanks are calculated.Fluid-solid coupling frequency,base shear and base overturning moment of the storage tank.Results suggest that the simplified and decoupling model is feasible.Secondly,using the finite element software,liquid sloshing of the liquid storage tanks are simulated and calculates the frequency of liquid sloshing and fluid-solid coupling.Also the fluid-solid coupling vibration mode is given.Through the comparison with the standard algorithm calculation result,one can draw a conclusion that the fluid-structure coupling frequency error is very small by using the finite element software.Finally,according to the non-stationary random ground motion models,the procedures and interfaces about rapid formation of ground motion is programmed,and the seismic response of reservoir tank is studied under the loads of acceleration waves.Four pieces of artificial waves are selected to analyze the seismic response by using Newmark-? numerical integration method.The results show that the impact on the reservoir tank is great under different seismic waves.Although the peak acceleration of input seismic waves is very close,the seismic responses of the storage liquid tanks come to be difference.This also proves that the simple selected and adjusted natural seismic records can not to be good input seismic waves,the synthetic seismic waves based on the seismic parameters could be better.