ANALYSIS OF VORTEX-INDUCED VIBRATION OF VARIABLE-TENSION VERTICAL RISERS IN LINEARLY SHEARED CURRENTS

Felix Ernesto Salazar Marin¹; Juan Pablo Julca Avila¹

¹ UFABC

Resumo

The main aim of this work is to simulate Vortex-Induced Vibration (VIV) in top tensioned long risers deep-water using a computational tool, written in FORTRAN, developed and implemented in advanced. A top tensioned riser is modeled as a vertical Euler-Bernoulli beam. A code for the static and dynamic analysis by Finite Element Method is developed. The 3D fluid flow around the riser is replaced by a determinate number of 2D cross-sections. In each hydrodynamic cross-section, fluid flow is calculated by the Discrete Vortex Method (DVM) to obtain drag and lift forces. Dynamics equations are solved using hydrodynamic forces previously calculated to get the dynamics-time response of vertical riser. The developed computational tool was implemented in the UFABC's cluster using High-Performance Computing techniques.

Palavras-chave: Top tensioned riser; Vortex-Induced Vibration; Finite Element Method; Discrete Vortex Method; High-Performance Computing