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Item Numerical Analysis of Base Isolated Liquid Storage Tanks(Springer Science and Business Media Deutschland GmbH, 2024) Jogi, P.; Jayalekshmi, B.R.Liquid storage tanks behave in a different manner as compared to any other type of structure when subjected to a dynamic loading, wherein the motions of lower and upper liquid are non-identical in nature. The upper liquid mass is named convective mass, which is responsible for sloshing and subsequent damage to the tank. Base isolation is an effective method in seismic response reduction of structures. Laminated rubber bearings (LRB) and lead core rubber bearings (LCRB) are used as effective base isolators for seismic response reduction across the globe. The current study deals with the reduction of hydrodynamic pressures induced due to seismic action in square and rectangular flexible tanks when isolated with LRB and LCRB. The transient analysis of 3D ground supported base isolated tanks subjected to El Centro and Northridge ground motions is performed using FE software. The coupled acoustic structural approach is employed in order to incorporate the fluid–structure-interaction effects. Variation of convective displacement is assumed according to a linear wave theory. It is found that a considerable reduction in impulsive pressures and sloshing is achieved by employing a lead core rubber bearing system. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Item Dynamic Response Analysis of Fluid Storage Tanks Using Coupled Acoustic-Structural Approach(Springer Science and Business Media Deutschland GmbH, 2024) Giridhar, P.; Jogi, P.; Jayalekshmi, B.R.Industrial fluid storage tanks are exposed to significant damage in earthquakes and cause the destruction of life and property. The seismic response of fixed-supported, three-dimensional rectangular rigid and flexible fluid storage tanks is analyzed using the finite element method. In this study, the fluid storage tanks are examined by utilizing coupled acoustic-structural (CAS) models. The convective displacement behaviors of rectangular liquid tanks are studied numerically under harmonic and earthquake excitations. The tank fluid–structure interaction (FSI) performance is studied by applying CAS methodology. Convective displacement, convective pressure component, impulsive pressure component, and total hydrodynamic pressures are analyzed for square and rectangular liquid storage tanks, and it is found that rectangular fluid storage tanks have more sloshing displacement and impulsive pressure component compared to square liquid storage tanks. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.