## 5 Conclusions  
In this paper, we carried out a shaking table test and numerical simulation study of a scaled model of a large LNG storage tank. Firstly, the models of the seismic storage tank and the seismic isolation tank were designed, and the sensors were arranged on the storage tank model. Secondly, the lead-core rubber bearing was designed according to the parameters  
Figure 16: Displacement cloud diagram of storage tank: (**a**) seismic storage tank; (**b**) isolation storage tank. Figure 15: Acceleration cloud diagram of storage tank: (**a**) seismic storage tank; (**b**) isolation storage tank. of the storage tank. Then, four seismic waves were selected as the external excitation for the shaking table test, and the shaking table test was carried out. The numerical model was used to simulate the dynamic response of the seismic storage tank and the isolation storage tank to verify the validity of the numerical model. On this basis, an actual LNG storage tank of 200,000 cubic meters was selected to study its seismic dynamic response and the effect of isolation bearings. The following conclusions are drawn:  
1. By processing the data in the condition of white noise, the natural vibration frequency of the tank model is obtained. After analysis, it can be seen that the natural vibration frequency of the storage tank model is significantly reduced after the isolation measures are taken. The isolation bearing has the same effect on the natural vibration frequency of the tank in the X- and Y-directions. 2. By analyzing the acceleration response of the seismic storage tank and the seismic isolation tank, it can be seen that the acceleration of the seismic storage tank shows an approximately linear increasing trend along the height direction. After the seismic isolation measures are taken, the acceleration response of the storage tank is significantly reduced. With the increase of peak acceleration of seismic waves, the seismic response of the storage tank model also increases, and the increase of the seismic storage tank is more obvious. 3. In this paper, the numerical model was used to simulate the dynamic response of the seismic storage tank and the isolation storage tank. By comparing test results and numerical simulation results, it can be seen that the calculation results of the numerical model can reflect the acceleration response of the storage tank model and its corresponding spectral characteristics. This verifies the feasibility and rationality of the numerical model. When studying the seismic dynamic response of large LNG storage tanks, the numerical model in this paper can be used for analysis. 4. Based on the numerical analysis results of a 200,000 cubic meter LNG storage tank, the average seismic isolation rates of base shear force and overturning bending moment are 66% and 36%, respectively, and the average seismic isolation rate of acceleration reaches 47.1%. The addition of seismic isolation bearings in the seismic design of LNG storage tanks is beneficial to reduce the construction cost of the storage tanks. However, the displacement of the storage tank will increase significantly after isolation. Therefore, the displacement of the LNG storage tank needs to be strictly controlled after the seismic isolation measures are taken. Writing--original draft preparation, Z.C. ; writing--review and editing, Z.X. ; methodology, L.T. and Z.Z. ; software, Z.X., J.F. and T.X. ; data curation, T.X. ; visualization, Z.Z. and T.X. All authors have read and agreed to the published version of the manuscript. The authors appreciate the testing facility, as well as the technical assistance provided by the CLP Power Wind/Wave Tunnel Facility at the Hong Kong University of Science and Technology. The work is funded by the Key Laboratory of Icing and Anti/De-icing of CARDC (Grant No. IADL 20200304), the National Natural Science Foundation of China (Grant No. : 51908090), the Fundamental Research Funds for the Central Universities (Project No.