Large Liquefied Natural Gas (LNG) tanks are prone to damage during strong earthquakes, and accurate seismic analysis must be performed during the design phase to prevent secondary disasters. However, the seismic analysis of large LNG tanks is associated with high computational requirements, which cannot be satisfied by the calculation efficiency of traditional analytical techniques such as the Coupled Eulerian–Lagrangian (CEL) method. Thus, this paper aims to employ a less computationally demanding algorithm, the Smoothed Particle Hydrodynamics-Finite Element Method (SPH-FEM) algorithm, to simulate large LNG tanks. The seismic response of a 160,000 m³ LNG prestressed storage tank is evaluated with different liquid depths using the SPH-FEM algorithm, and simulation results are obtained with excellent efficiency and accuracy. In addition, large von Mises stress at the base of the tank indicates that strong earthquakes can severely jeopardize the structural integrity of large LNG tanks. Therefore, the SPH-FEM algorithm provides a feasible approach for the analysis of large liquid tanks in seismic engineering applications.

中文翻译：

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考虑液量影响的大型液化天然气储罐的抗震分析

大型液化天然气（LNG）储罐在强烈地震中容易损坏，在设计阶段必须进行准确的地震分析以防止二次灾害。但是，大型LNG储罐的地震分析具有较高的计算要求，而传统的分析技术（例如，欧拉-拉格朗日耦合法（CEL））的计算效率无法满足这些要求。因此，本文旨在采用计算量较少的算法，即平滑粒子流体动力学有限元方法（SPH-FEM）算法，来模拟大型LNG储罐。160,000 m ³的地震响应使用SPH-FEM算法对不同液深的LNG预应力储罐进行了评估，并以优异的效率和准确性获得了模拟结果。此外，储罐底部的大冯·米塞斯应力表明，强烈的地震会严重危害大型液化天然气储罐的结构完整性。因此，SPH-FEM算法为地震工程应用中的大型液罐分析提供了一种可行的方法。