Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Fluid-Structure Interaction Simulation Of Marine Structures
Submission Author:
Renata Rocha , MG
Co-Authors:
Renata Rocha, Hélio Ribeiro Neto, Pedro Ricardo Corrêa Souza, Aristeu Silveira Neto, Aldemir Ap Cavalini Jr, João Marcelo Vedovotto
Presenter: Renata Rocha
doi://10.26678/ABCM.COBEM2019.COB2019-1131
Abstract
This paper presents numerical fluid–structure interaction (FSI) simulation of a pluck test applied to a Spool structure submerged in sea–water. The Navier–Stokes and mass conservation equations are solved in a Structured Adaptive Mesh Refinement (SAMR) framework used for fluid domain calculations and a Timoshenko beam finite element is used for the solution of displacements and velocities of the Spool structure. The coupling between fluid and solid domains is possible due to the usage of Immersed Boundary Method (IBM) and the strong coupling algorithm for FSI. The resulting computational fluid dynamic simulation with fluid–structure interaction is obtained using the in–house code MFSim. The pluck test in this context is emulated by a instantaneous force applied in a certain point of the structure, the displacement results influenced by the hydrodynamic loads are shown and discussed. An analysis of the FRF of the signal and the comparison between the natural frequencies in vacuum and water are shown. The results show the capabilities of the current methodology to estimate the natural frequencies of any beam structure surrounded by any fluid with only initial and boundary conditions, no adhoc constants or added mass methods are used.
Keywords
fluid-structure interaction, Spool, Vibrations, fluid dynamics
