Hydrodynamic Modeling of Infinite Reservoir Using Periodic Infinite Elements

The present work focuses on evaluating the hydrodynamic pressures exerted on structures such as dams, ports, and offshore structures is the objective of the present work. The near-infinite liquid reservoir is discretized by coupling finite elements with periodic infinite elements. A reformulation of infinite elements was performed to overcome their dependence on excitation frequencies and reservoir liquid compressibility. For this purpose, infinite elements are introduced into a two-dimensional finite element for fluid calculation program. In this study, both the containment structure and reservoir bottom are assumed to be infinitely rigid. The liquid in the reservoir is described by the pressure variable. Considered stresses are horizontal components of harmonic accelerations exerted on reservoir by structure monolith. The performance and efficiency of the proposed approach were tested under the influences of several parameters, including liquid compressibility, excitation frequency, truncation boundary position, reservoir bottom inclinations and fluid-structure interface inclinations. The results of this work are presented and compared with analytical solutions available in the literature and with existing numerical models.