Modelagem por elementos finitos de estruturas flexíveis

Abstract

In the present work was performed a nonlinear finite element modeling in flexible structures. The main objective of this project is the spatial compatibilization between different meshes fluid-structures interaction simulation. Therefore, coupling algorithms have been created so that nodal displacements, velocity and acceleration of structural model obtained from the Cosserat beams theory, were transported to structure immersed surface. It is noteworthy that distinct meshes are been used for different domains, fluid and structural, the first is represented by centroid lines and is one-dimensional the second is represented by a surface that define the immersed structural format. The present work focus on the computational algorithm implementation that will possibility the exchange on the kinematics between domains. The algorithm developed on Matlab® environment. The model validation done using one immersed structural on shell model with the commercial software Ansys. The previous structural mesh brought to Matlab® and compared to kinematics data from a theoretical model. After that riser and catenaries structures formats are simulated. The contour conditionals applied to the structural models on Matlab® and Ansys environment generated charts from temporal displacement that are analyzed and compared with the theory and practice to validate the implemented algorithm.