Research On LNG Storage Tank Shaking Table Test Numerical Simulation

In recent years,due to increased activity in the global plate motion,earthquake-prone,Similar situations which is LNG storage tank structure suffered damage appeared under seismic excitation have occurred frequently.Shaking table test as an important means of seismic research is more and more widely used in the tank in seismic research.This study is conducted in order to explore the role of fluid-structure coupling,Shaking table tests simulate the impact of the reservoir.Deduced in this paper is similar to the relationship between the two power-Consideration of fluid coupling power relationships and do not consider a similar fluid-structure coupling force similar relationship.LNG storage tank with engineering background and a combination of these two similar relationship is considered experimental fluid-solid coupling model and does not consider the role of test fluid-solid coupling model.Using the finite element software Adina these two test models and prototypes LNG tank structure dynamics numerical analysis calculations.Through the above numerical analysis,this article on the two test models and prototypes LNG tank structure comparison.By numerical simulation calculations above,this paper demonstrates the reservoir of liquid sloshing frequencies include rigid body motion frequency,liquid and liquid-solid coupling sloshing frequency vibration frequency of three parts.Meanwhile,the paper also demonstrates the tank in the form of liquid-solid coupling vibration presents diversity,radial vibration,ring to multiple wave modes and beam vibration.By analyzing the effective control of the quality factor,demonstrated the beam modes play a leading role in the coupling of vibration in the tank and in good agreement with theory.By numerical simulation calculations above,this paper demonstrates the reservoir of liquid sloshing frequencies include rigid body motion frequency,liquid and liquid-solid coupling sloshing frequency vibration frequency of three parts.Meanwhile,the article also demonstrates the liquid-solid coupling vibration diversity presented in the form of the tank,there is a radial vibration,ring to multiple wave modes and beam vibration type.By analyzing the effective control of the quality factor,demonstrated the cos? beam modes play a leading role in the coupling of vibration in the tank,and with haroun-housner theory are in good agreement.By comparing the results of the analysis,we reached the following conclusion: When the tank structure during the shaking table test,to measuring displacement,acceleration and shaking waves higher dynamic response parameters and frequency of vibration characteristics,should be used to consider the flow solid coupling experimental model shaking table test;To measured stress response parameters such as power,should not be considered experimental fluid-solid coupling model shaking table tests.