Dynamic Behavior Analysis of LNG Tank Under Different Earthquake Loads

Abstract

Liquefied natural gas (LNG) is widely used all over the world and is transported by different types of pressurized tanks, among which the most convenient transfer method is a type C pressurized cylindrical tank. Any damage or leak in the tank might pose a serious risk. As a result, it is critical to investigate both its static and dynamic features. This paper represents the computational analysis of how the tank will behave under different load cases and also under different earthquake ground motions. The static analysis has been done with different internal pressure stresses and ultimate bearing pressure stress has been recognized. The tank has been subjected to modal analysis to get various mode shape findings with resonant frequencies in order to satisfy the requirements for analyzing the tank under various earthquake ground motions. Transient analysis has been utilized to assess dynamic behavior. A concept of selecting different ground motions is presented in this paper. Site parameters have been split into four categories, and the four sites with the severest real ground motions have been selected for this study. The paper represents how the tank will deform under different earthquake motions based on its location and site categories.