Análisis aeroelástico de chimeneas de acero utilizando elementos no-lineales de lámina sin rotación

Abstract

As alternative to methods presented in several codes around the world to analyze chimneys, an analysis procedure based in the finite element method is presented. To achieve a reliable analysis, a stabilized incompressible fluid with an ALE scheme is used to simulate wind action. Geometrically nonlinear BST rotation-free shell elements are used to model a steel chimney and both schemes are coupled to simulate the fluid-structure interaction of chimneys. Shell elements without rotation degrees improve time solution due to a significant reduction of degrees of freedom in the geometrically nonlinear system. A strong coupling scheme with Aitken relaxation method is used to ensure convergence. Detailed theory for fluid, structure and interaction can be founded in [1]. Differences between code analysis and the proposed procedure are presented for a case of study.

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