Solid-liquid Coupling Seismic Response Analysis Of LNG Outside Cans

According to the latest China (2010) liquefied natural gas (LNG) development report shows that, China's LNG imports in 2015 is expected to more than 20 million tons,in 2020 will be doubled.LNG use under the plan. the total demand for LNG in China in 2020 will reach 300 billion m~3, while natural gas production was 240 billion m~3.The impact on demand for LNG storage tanks growing, but domestic LNG storage tank of just an initial stage of the analysis of dynamic characteristics of its still relatively small, particularly in seismic performance of its not deep enough.Therefore, this thesis research for the LNG storage tank and seismic response analysis, this study has important significance.The main research work focuses on concrete outside the tank LNG, and analyze the LNG inner storage leak, LNG tank outside the free vibration analysis and seismic response analysis, the main contents include:.1,LNG storage tank outside the tank finite element modelThe finite element software ADINA finite element model, the use of ADINA cell libraries provided SHELL elements and 3D-SOLID elements were established concrete LNG storage tank outside the tank model, and the vibration characteristics of the model verify its reasonableness.2,LNG storage tank outside the tank of the free vibration analysisEstablish two LNG storage tanks (empty and full cans) that is outside the tank model: LNG external tank (empty) and after the reservoir is full of wall leakage outside the tank (full tank) state model, respectively, modal analysis of its , two finite element models are the natural frequencies and mode shapes of vibration of empty and full cans of features, and verify the correctness of the model shell element SHELL, provide the basis for the seismic response analysis.3,LNG storage tank outside the tank seismic response analysisAccording to China's latest 2010, "Seismic Design of Buildings" requirements, select the three types of seismic waves, respectively, of the two tanks (tank empty and full) model one-way under the level of seismic response analysis, were obtained outside the special position of the tank wall time-point curves of the three LNG storage tank outside the tank under seismic displacement, acceleration, circumferential stress, circumferential strain and full tank moment distribution of hydrodynamic pressure, and were empty and consider the liquid-solid full tank coupling Comparative Analysis of seismic response.