Seismic Response Analysis Of AP1000 Nuclear Power Structure

Nuclear power is one of the world's major energy, it can continue to generate electricity.Compared to other power generation, nuclear power has many irreplaceable advantages.Such as nuclear is low carbon and canprotect environmental.In today's society,it has become an irreplaceable energy.But the safety of nuclear power has been widely concerned.The nuclear leak caused by the nuclear power plant in Fukushima in March 11,2011 has caused the world to panic.In order to ensure the safety of nuclear power structure,this paper selects the third generation of nuclear power which is the AP1000 structure.ADINA finite element analysis software is used to analyze the numerical simulation in this paper. This paper studied the earthquake responses of AP1000 storage tank considering its self weight, sloshing and earthquake motions.This paper mainly completes the following work:(1) Firstly, using hypermesh software, a three-dimensional finite element model of AP1000 structure is established,including two models of Fluid-structure couplingmodel and liquid sloshing.Then the modal analysis is carried out. When the liquid is sloshing, basic vibration frequency of structure is low, among which is cosn? beam vibration ,liquid sloshing is a lower frequency vibration.When considering the coupling effect of liquid and solid, the structure is close to the actual structure;(2)Secondly,the amount of liquid in the tank is an important factor.In this paper, PCS tank without liquid?the 1/2 volume and 3/4 volume of PCS water tank are considered respectively.The model is close to the coupling effect in the actual situation.At the same time,it is found that the water in the water tank has the function of flexible support, which can increase the natural vibration period of the structure.Compared with PCS tank without liquid?the 1/2 volume and 3/4 volume of PCS water tank ,the liquid sloshing has an inevitable impact on the structure, and it also shows that the frequency of free sloshing is independent of the structure;(3)Thirdly,analyses the seismic response of AP1000 affected by accelaration versus time data of seismic wave.In this paper, we select two natural seismic waves and an artificial earthquake wave.When the model is a fluid solid coupling, analysis Mises force, displacement,acceleration and base shear stress of the AP1000 nuclear power structure. When the model is liquid sloshing, analysis liquid sloshing wave height of the AP1000 nuclear power structure.After adjusting the three earthquake wave ,structure is almost the same;(4)Finally,analyses the seismic response of AP1000,in this paper, PCS tank without liquid?the 1/2 volume and 3/4 volume of PCS water tank are considered.It is found that:Liquid has a greater impact on the structure of nuclear power;...