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COBEM 2017
24th ABCM International Congress of Mechanical Engineering
CANTILEVERED PIPE EJECTING FLUID UNDER VIV: NON-LINEAR REDUCED ORDER MODELING AND ANALYSIS
Submission Author:
Renato Maia Matarazzo Orsino , SP , Brazil
Co-Authors:
CELSO Pupo Pesce, Guilherme Franzini, Renato Maia Matarazzo Orsino
Presenter: Renato Maia Matarazzo Orsino
doi://10.26678/ABCM.COBEM2017.COB17-1112
Abstract
This paper aims to present a non-linear reduced order model for a submerged cantilevered pipe ejecting fluid under VIV, addressing an issue hardly treated in the literature: the combined effects of internal and external flow in Fluid-Structure Interactions. The strategy for doing so is based on the application of the Modular Modeling Methodology, originally developed for lumped parameter systems, which proved to be very effective for the derivation of discretized equations of motion for a pipe conveying fluid. Whithin this methodology, not only subsystems might be treated individually but also, in a first approach, compatibility conditions can be neglected and non-linear terms can be replaced by redundant variables, once an algorithm allows to enforce constraints a posteriori. Such a modular approach proves to be particularly adequate for coupling, under the adopted hypotheses, phenomenological nonlinear wake-oscillators models to the previously introduced formulation for the pipe. Numerical simulations provide further discussions on the response of the non-linear reduced order model proposed.
Keywords
fluid-structure interaction (FSI), Pipe Conveying Fluid, vortex induced vibrations, wake-oscillators, modular modeling methodology
