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DINAME2019
DINAME2019
Stochastic Model for Multiphased Flow Induced Pipe Vibrations
Submission Author:
Pedro Ponte , RJ
Co-Authors:
Pedro Ponte, Thiago Ritto, Jean-François Deü
Presenter: Pedro Ponte
doi://10.26678/ABCM.DINAME2019.DIN2019-0057
Abstract
This work is interested in investigating uncertainty propagation in the coupled fluid-structure dynamics of a pipe conveying fluid. Specifically, a two phased flow is considered, and parametric uncertainties are taken into account using a probabilistic approach. The Euler-Bernoulli beam is employed to model the pipe structure, with simply supported boundary conditions. The inner fluids are modeled using the plug flow approximation, and the extended Hamilton’s principle is applied to obtain the partial differential equation of the system under analysis. The system is discretized by finite element method, and the Runge-Kutta scheme is used to integrate the equations. Monte Carlo simulations are obtained to approximate the statistics of the variables of interest. The uncertain parameters considered in the work are: the value of the flow velocity and the fluid volumetric fraction. Fluid velocity acts in the pipe like a compression load reducing system stiffness, which might cause fatigue failure, and buckling.
Keywords
multiphase flow, flow-induced vibration, nonlinear dynamics, fluid-structure interaction, Stochastic Modeling
